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Web Apps

HTML/CSS/JS and Next.js applications

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AI Resume Tailor

Paste a job description, upload your resume, and get a tailored version optimized for the role.

Spec OnlyContent

Ascii Art Generator

Convert text to ASCII art with multiple font styles.

✓ BuiltContent
Open App →

Blog Cms

Headless blog CMS with markdown editor and API. Built with Next.js 15.

✓ BuiltContent
Open App →

Changelog App

Beautiful public changelog for products with categorized entries and email notifications

✓ BuiltContent
Open App →

Changelog Generator

Paste git commit messages, auto-categorize them by type , and generate a beautifully formatted changelog.

✓ BuiltContent
Open App →

Code Snippet Share

Create beautiful code snippet images with syntax highlighting, custom themes, and social media export. Carbon.sh alternative.

✓ BuiltContent
Open App →

Developer Roadmap

Interactive technology career roadmap with progress tracking, resource links, and personalized learning paths.

✓ BuiltContent
Open App →

Digital Garden

Personal knowledge garden with bidirectional links. Built with Next.js 15.

✓ BuiltContent
Open App →
C

Digital Garden Builder

Create and publish a personal knowledge garden with bidirectional links and graph visualization.

Spec OnlyContent

Documentation Site

Create beautiful documentation with versioning. Built with Next.js 15.

✓ BuiltContent
Open App →

Email Template Builder

Drag-and-drop HTML email builder with inline CSS for maximum compatibility.

✓ BuiltContent
Open App →
C

Epub Reader Offline

Privacy-first EPUB reader that works entirely offline. Bookmarks, highlights, font customization, and reading progress tracking.

Spec OnlyContent
C

Interview Question Generator

The interview-question-generator app allows users to input a job description and select a technology stack to generate ten tailored technical interview questions along with their answers. This applica

Spec OnlyContent

Knowledge Base

Searchable documentation site with categories and search

✓ BuiltContent
Open App →

Landing Page

A high-converting SaaS landing page template with modern design.

✓ BuiltContent
Open App →

Link In Bio

A Linktree-style link-in-bio page builder with custom themes.

✓ BuiltContent
Open App →

Markdown Blog

A split-pane markdown editor with live preview. Uses the `marked` library via CDN.

✓ BuiltContent
Open App →
C

Markdown Blog Generator

The markdown-blog-generator is a web application that allows users to drop a folder of Markdown files and instantly view them as a styled static site locally. It leverages modern web technologies to p

Spec OnlyContent
C

Markdown Presentation Builder

Write presentations in Markdown with slide transitions, themes, and speaker notes support.

Spec OnlyContent
C

Markdown Slide Presenter

Write Markdown and present it as beautiful slides. Support for speaker notes, themes, code highlighting, and export to PDF.

Spec OnlyContent

Microblog

Short-form blogging platform with feeds and likes. Built with Next.js 15.

✓ BuiltContent
Open App →

Newsletter Platform

Create and send email newsletters with templates. Built with Next.js 15.

✓ BuiltContent
Open App →
C

OG Image Generator

Design Open Graph social preview images with templates. Customize title, description, logo, and background. Export optimized PNG.

Spec OnlyContent

Podcast Platform

Host and manage podcast episodes with RSS. Built with Next.js 15.

✓ BuiltContent
Open App →

Portfolio Site

A personal portfolio website showcasing projects, skills, and contact information.

✓ BuiltContent
Open App →
C

Pricing Page Generator

Design and export responsive SaaS pricing pages with feature comparison tables.

Spec OnlyContent

Privacy Policy Generator

Generate privacy policy pages from a questionnaire.

✓ BuiltContent
Open App →

Quiz Maker

Create shareable quizzes with analytics and lead capture

✓ BuiltContent
Open App →

Resume Builder

A client-side resume builder with multiple templates and PDF export.

✓ BuiltContent
Open App →
C

Resume Keyword Matcher

Match resume keywords against job descriptions with ATS compatibility score and gap analysis.

Spec OnlyContent

Terms Generator

Generate terms of service from templates.

✓ BuiltContent
Open App →

Wiki Engine

Collaborative wiki with linking and search. Built with Next.js 15.

✓ BuiltContent
Open App →

Writing Statistics

Paste text to get readability scores, reading time, word frequency, sentence analysis, and sentiment detection.

✓ BuiltContent
Open App →

Agent Platform

✓ BuiltDeveloper
Open App →

API Contract Registry

Central registry for OpenAPI/Swagger specs.

✓ Builtengineering
Open App →
📦

API Latency Simulator

Test frontend resilience against artificially delayed API responses with configurable latency profiles.

Spec Onlyengineering
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API Mock Server Local

```markdown

Spec Onlyengineering
📦

API Response Mocker

Create mock API endpoints with custom JSON responses, status codes, and delay simulation.

Spec Onlyengineering
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API Waterfall Visualizer

```markdown

Spec Onlyengineering
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Cache Header Playground

```markdown

Spec Onlyengineering
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Capacity Planning Tool

Forecast infrastructure capacity needs.

Spec Onlyengineering
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Ci Build Time Analyzer

Analyze CI pipeline duration and bottlenecks.

Spec Onlyengineering
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Cicd Pipeline Visualizer

Paste GitHub Actions or GitLab CI YAML and get a visual flowchart of the pipeline stages.

Spec Onlyengineering
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Cors Debugger Web

```markdown

Spec Onlyengineering
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Cron Expression Translator

The cron-expression-translator app allows users to input a cron string and receive a natural language description of the schedule, such as "Every day at midnight." Additionally, the app provides the

Spec Onlyengineering
📦

Cron Job Monitor Dashboard

Visual dashboard for monitoring cron job execution history, success rates, and timing.

Spec Onlyengineering

Data Pipeline Lineage

Visual lineage graph for ETL jobs.

✓ Builtengineering
Open App →
📦

Database Er Diagram Builder

Draw entity-relationship diagrams interactively and export as SQL migration scripts.

Spec Onlyengineering

Database Schema Visualizer Web

Visualize DB relationship from SQL DDL.

✓ Builtengineering
Open App →

Deployment Frequency Tracker

DORA metrics dashboard.

✓ Builtengineering
Open App →
📦

Docker Compose Visualizer

Upload a docker-compose.yml file to generate an interactive network diagram showing services, volumes, and dependencies.

Spec Onlyengineering
📦

Docker Layer Analyzer

Visualize Docker image layers, identify large layers, and get optimization recommendations.

Spec Onlyengineering
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Error Log Interpreter

```markdown

Spec Onlyengineering
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Feature Flag Playground

Simulate feature flag configurations and user targeting rules with live preview.

Spec Onlyengineering
📦

Git Branch Namer

Generate git branch names from ticket descriptions following conventions like feature/, bugfix/, hotfix/ with slug formatting.

Spec Onlyengineering
📦

Git Conflict Resolver AI

```markdown

Spec Onlyengineering
📦

Git Ignore Generator

The git-ignore-generator is a web application that allows users to select various frameworks and tools to instantly generate a comprehensive `.gitignore` file tailored to their specific needs. By stre

Spec Onlyengineering
📦

Graphql Playground Local

Local GraphQL query editor with schema explorer, auto-complete, query history, and variable support. No server needed for schema exploration.

Spec Onlyengineering
📦

Graphql To Rest Converter

Convert GraphQL schemas to REST endpoint documentation with request/response examples.

Spec Onlyengineering
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Incident Status Page Gen

Generator for public status pages.

Spec Onlyengineering

Iot Realtime Dashboard

Real-time visualization for MQTT/Websocket IoT sensors.

✓ Builtengineering
Open App →

K8s Cluster Explorer

Read-only visualizer for Kubernetes resources.

✓ Builtengineering
Open App →
📦

Kubernetes Manifest Validator

Validate Kubernetes YAML manifests with best-practice linting and security checks.

Spec Onlyengineering
📦

Legacy Code Modernizer

The legacy-code-modernizer application allows users to input outdated code snippets, such as those written in jQuery, and receive a rewritten version in modern Vanilla JavaScript or React hooks. This

Spec Onlyengineering
📦

Local Dev Dashboard

```markdown

Spec Onlyengineering

Log Anomaly Detector Web

Web interface for spotting log anomalies.

✓ Builtengineering
Open App →
📦

Log File Viewer

Fast, filterable viewer for large log files in the browser with syntax highlighting and regex search.

Spec Onlyengineering
📦

Manufacturing Floor View

Digital twin style view of a manufacturing floor.

Spec Onlyengineering

Network Topology Mapper

Visualize network devices and connections.

✓ Builtengineering
Open App →
📦

NPM Audit Visualizer

Parse npm audit JSON output into a visual dependency tree showing vulnerability severity, affected packages, and fix recommendations.

Spec Onlyengineering
📦

NPM Package Phobia

npm-package-phobia is a web application that allows users to enter a package name and retrieve information about its install size, dependency tree depth, and suggestions for lighter alternatives. This

Spec Onlyengineering
📦

NPM Script Runner UI

The npm-script-runner-ui is a web application that enables users to easily parse and visualize the scripts defined in their `package.json` files. It provides a user-friendly graphical interface for ex

Spec Onlyengineering

Oauth Flow Simulator

```markdown

✓ Builtengineering
Open App →
📦

Openapi Diff Viewer

Visual side-by-side diff between two OpenAPI specification versions, highlighting breaking changes.

Spec Onlyengineering
📦

Package JSON Builder

Visual package.json editor with field validation, dependency search, and script management. Export valid package.json files.

Spec Onlyengineering
📦

Port Scanner Web

Check if common ports are open on a given host. Visual status display with service identification for known ports.

Spec Onlyengineering
📦

PR Review Summarizer

```markdown

Spec Onlyengineering
📦

Project Scaffolding Prompt Gen

```markdown

Spec Onlyengineering

Server Room Inventory Mgr

Manage physical server rack inventory.

✓ Builtengineering
Open App →
📦

SSL Cert Monitor Dashboard

Monitor SSL certificate expiration.

Spec Onlyengineering

Terraform State Visualizer

Visualize Terraform state file resources.

✓ Builtengineering
Open App →
📦

Test Case Brainstormer

```markdown

Spec Onlyengineering
📦

Tsconfig Builder

Visual tsconfig.json builder with explanation for every option. Preset templates for React, Node, library projects.

Spec Onlyengineering
📦

Unit Test Generator Web

Paste a JavaScript/TypeScript function and generate a test skeleton with common test cases and edge cases.

Spec Onlyengineering
📦

Uptime Status Page

Generate static uptime status pages. Configure services, set status, add incident history. Export as deployable HTML.

Spec Onlyengineering
📦

Webhook Debugger

Inspect incoming webhook payloads in real-time with request history and replay functionality.

Spec Onlyengineering
📦

Webhook Tester Local

```markdown

Spec Onlyengineering

Audit Log Viewer Central

Centralized viewer for disparate system audit logs.

✓ Builtenterprise
Open App →
📦

Aws Finops Visualizer

Visualize AWS cost anomalies and usage patterns for specific services.

Spec Onlyenterprise

Cloud Access Request System

Just-in-time access requests for cloud resources.

✓ Builtenterprise
Open App →
📦

Component Library Showcase

```markdown

Spec Onlyenterprise

Contract Renewal Monitor

Track SaaS and vendor contract renewals.

✓ Builtenterprise
Open App →

Corporate Directory Tree

Visual org chart and employee directory.

✓ Builtenterprise
Open App →

Feature Flag Audit

Audit usage and staleness of feature flags.

✓ Builtenterprise
Open App →

Gdpr Request Manager

Manage GDPR Data Subject Access Requests . Workflow automation.

✓ Builtenterprise
Open App →
📦

HTTP Security Headers Checker

Audit any URL's security headers with detailed grades and fix recommendations.

Spec Onlyenterprise

Incident Postmortem Builder

Collaborative tool for writing SRE postmortems.

✓ Builtenterprise
Open App →

Legacy API Gateway Mock

Mock gateway for legacy SOAP/XML APIs. Modernize interface to REST/JSON.

✓ Builtenterprise
Open App →

License Compliance Tracker

Scan dependencies for OSS licenses. Flag viral/banned licenses.

✓ Builtenterprise
Open App →
📦

Mockup Device Framer

Place screenshots into realistic device mockup frames for presentations.

Spec Onlyenterprise

Onboarding Checklist Automation

IT onboarding automation for new hires.

✓ Builtenterprise
Open App →

Policy Distribution Center

Distribute company policies and track employee acknowledgement.

✓ Builtenterprise
Open App →
📦

Privacy Policy Audit Tool

Analyze privacy policies with readability scores, red flag detection, and GDPR/CCPA compliance checks.

Spec Onlyenterprise
📦

Privacy Policy Generator

Interactive privacy policy builder. Answer questions about your app, generate a compliant privacy policy in HTML or Markdown.

Spec Onlyenterprise

Release Notes Manager

Manage internal and external release notes.

✓ Builtenterprise
Open App →
📦

Responsive Email Tester

Preview HTML email templates across different device sizes and email clients. Check rendering compatibility visually.

Spec Onlyenterprise
📦

Robots Txt Generator

Interactive robots.txt builder with validation. Add rules for crawlers, preview the file, test against URLs.

Spec Onlyenterprise
📦

Screenshot Mockup Generator

Place app screenshots inside device mockup frames . Export high-res marketing images.

Spec Onlyenterprise
📦

SEO Meta Tag Previewer

```markdown

Spec Onlyenterprise
📦

Sitemap Visualizer

Upload sitemap.xml or enter URL to visualize site structure as an interactive tree with page count and depth analysis.

Spec Onlyenterprise
📦

Soc2 Evidence Collector

Automated SOC 2 evidence collection dashboard. Connects to AWS/GitHub/Jira.

Spec Onlyenterprise
📦

UI Component Anatomy

```markdown

Spec Onlyenterprise

Vendor Risk Portal

Assess and monitor third-party vendor security risks.

✓ Builtenterprise
Open App →
F

Budget Forecaster

```markdown

Spec OnlyFinance

Budget Planner

Monthly budget planning with categories and tracking. Built with Next.js 15.

✓ BuiltFinance
Open App →

Compound Interest

Visualize compound interest growth over time.

✓ BuiltFinance
Open App →
F

Compound Interest Visualizer

Interactive compound interest calculator with animated charts showing growth over time.

Spec OnlyFinance

Crypto Portfolio

Track cryptocurrency holdings and performance. Built with Next.js 15.

✓ BuiltFinance
Open App →
F

Crypto Tax Estimator

Estimate capital gains and losses from cryptocurrency transaction history with FIFO/LIFO methods.

Spec OnlyFinance

Currency Converter

Offline currency converter with saved exchange rates.

✓ BuiltFinance
Open App →
F

Expense Receipt Scanner

OCR scan receipts directly in the browser, categorize expenses, and export to CSV or accounting software.

Spec OnlyFinance

Expense Tracker

Personal expense tracking app with categories, budgets, and charts.

✓ BuiltFinance
Open App →

Freelance Dashboard

Dashboard for freelancers with income and time tracking. Built with Next.js 15.

✓ BuiltFinance
Open App →
F

Freelance Invoice Generator

Create beautiful, professional invoices with time tracking, tax calculation, and PDF export.

Spec OnlyFinance

Freelance Rate Calculator

Calculate ideal hourly and project rates based on expenses, working hours, vacation days, and target income.

✓ BuiltFinance
Open App →

Invoice Generator

Create professional invoices with PDF export and client management.

✓ BuiltFinance
Open App →

Loan Calculator

Calculate monthly payments, interest, and amortization schedules.

✓ BuiltFinance
Open App →

Mortgage Calculator

Mortgage/KPR calculator with amortization schedule, comparison charts, and early repayment scenarios.

✓ BuiltFinance
Open App →
F

Mortgage Calculator Visual

Interactive mortgage amortization calculator with visual charts. Compare scenarios, see monthly payments, total interest paid.

Spec OnlyFinance
F

Saas Mrr Calculator

Calculate Monthly Recurring Revenue, ARR, churn rate, and LTV from subscription data.

Spec OnlyFinance

Salary Calculator

Gross-to-net salary calculator with tax brackets for Indonesia , US, and other countries.

✓ BuiltFinance
Open App →

Split Expense

Split group expenses and track who owes whom. Built with Next.js 15.

✓ BuiltFinance
Open App →
F

Startup Valuation Calculator

Estimate startup valuation using multiple methods: DCF, comparables, revenue multiples, and Berkus.

Spec OnlyFinance
F

Stock Dividend Tracker

Track dividend income across a stock portfolio with yield calculations and payment schedules.

Spec OnlyFinance

Stock Watchlist

Track stock prices with customizable watchlists. Built with Next.js 15.

✓ BuiltFinance
Open App →
F

Timesheet Generator PDF

The timesheet-generator-pdf application allows users to input their weekly hours worked per day and generates a clean, professional PDF timesheet. This tool is designed for freelancers and employees w

Spec OnlyFinance

Tip Calculator

A beautifully designed tip calculator with bill splitting, custom tip percentages, and per-person breakdowns.

✓ BuiltFinance
Open App →
F

Tip Calculator Splitter

Bill splitting tool with tip calculation, custom share amounts, and per-person breakdown.

Spec OnlyFinance

Shared

Shared utilities, types, and components used across all web apps.

✓ BuiltPackages
Open App →

Bookmark Manager

Organize, tag, and search your bookmarks with previews. Built with Next.js 15.

✓ BuiltProductivity
Open App →

Calculator

A beautiful, functional calculator app. Vanilla HTML/CSS/JS, no dependencies.

✓ BuiltProductivity
Open App →

Daily Checklist

Simple daily checklist that resets each day.

✓ BuiltProductivity
Open App →
P

Daily Journal Web

Private, client-side encrypted daily journaling app with mood tracking and search.

Spec OnlyProductivity
P

Daily Standup Generator

The daily-standup-generator is a web application designed to streamline the daily standup process for development teams. Users can input their yesterday's commits, today's goals, and any blockers they

Spec OnlyProductivity

Decision Matrix

Weighted decision matrices for comparing options. Built with Next.js 15.

✓ BuiltProductivity
Open App →
P

Decision Matrix Builder

Weighted decision matrix tool with interactive scoring, visualization, and export.

Spec OnlyProductivity

Event Planner

Plan events with checklists, guest lists, and budget tracking. Built with Next.js 15.

✓ BuiltProductivity
Open App →

Feedback Board

Public roadmap and feature voting platform for products

✓ BuiltProductivity
Open App →

Flashcard App

Create and study flashcards with spaced repetition.

✓ BuiltProductivity
Open App →

Focus Playlist

Ambient sounds and lo-fi beats player with built-in pomodoro timer, mixing controls, and session tracking.

✓ BuiltProductivity
Open App →

Form Builder

Drag-and-drop form creator with submissions management

✓ BuiltProductivity
Open App →
P

Habit Dashboard Web

Beautiful habit tracking dashboard with GitHub-style heatmaps, streaks, and statistics.

Spec OnlyProductivity

Habit Tracker

Daily habit tracking with streaks, stats, and visual progress.

✓ BuiltProductivity
Open App →
P

Habits Heatmap Local

```markdown

Spec OnlyProductivity
P

Ics Calendar Viewer

Upload ICS calendar files to view events in a visual calendar interface. Support for recurring events and timezone conversion.

Spec OnlyProductivity

Kanban Board

Drag-and-drop Kanban board with local persistence.

✓ BuiltProductivity
Open App →
P

Kanban Board Offline

The Kanban Board Offline app is a productivity tool that mimics the functionality of Trello, enabling users to create, manage, and organize their tasks seamlessly without an internet connection. It le

Spec OnlyProductivity
P

Keyboard Shortcut Trainer

Practice and memorize VS Code, IntelliJ, or Vim keyboard shortcuts through interactive drills with scoring and streaks.

Spec OnlyProductivity

Meeting Cost Calculator

Calculate the real-time cost of meetings.

✓ BuiltProductivity
Open App →
P

Meeting Notes Action Items

```markdown

Spec OnlyProductivity

Notes App

A rich-text notes app with folders, tags, and markdown support.

✓ BuiltProductivity
Open App →

Okr Tracker

Track objectives and key results with progress updates. Built with Next.js 15.

✓ BuiltProductivity
Open App →
P

Parking Cost Calculator

Calculate parking costs across different lots with time-based progressive pricing, commonly used in Indonesian malls.

Spec OnlyProductivity

Poll Creator

Create and share polls with real-time results visualization.

✓ BuiltProductivity
Open App →

Pomodoro Dashboard

A feature-rich Pomodoro timer with session tracking, statistics dashboard, and ambient sounds. Track focus habits over time.

✓ BuiltProductivity
Open App →
P

Pomodoro Timer Advanced

```markdown

Spec OnlyProductivity

Project Tracker

Track projects with milestones, deadlines, and progress bars. Built with Next.js 15.

✓ BuiltProductivity
Open App →

Reading List

Track books and articles you want to read.

✓ BuiltProductivity
Open App →
P

Reading Speed Calculator

Estimate reading time for pasted text or URLs with WPM calibration and speed training.

Spec OnlyProductivity

Resource Planner

Allocate team resources across projects and time. Built with Next.js 15.

✓ BuiltProductivity
Open App →

Retrospective Board

Run team retrospectives with anonymous voting. Built with Next.js 15.

✓ BuiltProductivity
Open App →

Sprint Planner

Plan and manage agile sprints with story points. Built with Next.js 15.

✓ BuiltProductivity
Open App →

Standup Generator

Generate daily standup updates by entering yesterday's tasks, today's plan, and blockers with templates and history.

✓ BuiltProductivity
Open App →

Time Tracker

Track time spent on projects and tasks with reports and charts.

✓ BuiltProductivity
Open App →

Time Tracker Web

Track time on tasks with start/stop timer.

✓ BuiltProductivity
Open App →
P

Time Zone Meeting Planner

Find overlapping working hours across multiple time zones with visual timeline.

Spec OnlyProductivity

Todo List

A clean todo list app with localStorage persistence. No frameworks, no backend.

✓ BuiltProductivity
Open App →

Typing Test

Typing speed test with WPM calculation and accuracy tracking.

✓ BuiltProductivity
Open App →
P

Weekly Meal Prep Planner

Plan meals for the week with auto-generated grocery lists, calorie estimates, and recipe links.

Spec OnlyProductivity

Whiteboard

Collaborative-style whiteboard with drawing tools.

✓ BuiltProductivity
Open App →
P

Writing Streak Tracker

Track daily writing goals with streak counting, word count history, and motivational stats.

Spec OnlyProductivity
S

Birthday Reminder Dashboard

Track birthdays with countdown timers, age calculations, and gift idea suggestions.

Spec OnlySocial

Bookmarks Manager

A web-based bookmark manager with tags, folders, and search.

✓ BuiltSocial
Open App →

Community Forum

Discussion forum with threads and categories. Built with Next.js 15.

✓ BuiltSocial
Open App →
S

Emoji Kitchen Local

Combine two emojis to create mashup emoji art locally. Browse combinations, download as PNG or copy as Unicode.

Spec OnlySocial

Event Rsvp

Create event pages with RSVP and guest management. Built with Next.js 15.

✓ BuiltSocial
Open App →

Guestbook

Digital guestbook for websites with moderation. Built with Next.js 15.

✓ BuiltSocial
Open App →

Link In Bio

Custom bio page with analytics, custom themes, and click tracking

✓ BuiltSocial
Open App →

Meme Generator

Create memes with text overlays on template images.

✓ BuiltSocial
Open App →

Poll Creator

Create real-time polls with live results and beautiful visualizations

✓ BuiltSocial
Open App →

Poll Maker

Create shareable polls with real-time results visualization.

✓ BuiltSocial
Open App →

Shoutout Wall

Public appreciation wall for teams and communities. Built with Next.js 15.

✓ BuiltSocial
Open App →

Team Retro

Real-time retrospective board with categories , anonymous voting, and facilitation mode.

✓ BuiltSocial
Open App →

Testimonial Wall

Collect and display customer testimonials with video support and embeddable widgets

✓ BuiltSocial
Open App →

Waitlist Page

Email capture landing page with referral tracking and viral sharing mechanics

✓ BuiltSocial
Open App →
S

Wifi QR Generator Web

Generate QR codes to share WiFi credentials. Enter SSID, password, encryption type. Download or print QR code.

Spec OnlySocial
T

AI API Doc Generator

Upload an OpenAPI spec and generate beautiful, human-readable API documentation with code examples.

Spec OnlyTools

AI Architectural Reviewer

```markdown

✓ BuiltTools
Open App →
T

AI Changelog Writer

Generate polished release notes and changelogs from git log history, organized by category.

Spec OnlyTools
T

AI Color Palette From Photo

Upload a photo and extract a harmonious design color palette using AI-powered color analysis.

Spec OnlyTools

AI Commit Message

Paste a diff or changed files and get a conventional commit message suggestion.

✓ BuiltTools
Open App →
T

AI Commit Message Writer

Paste a git diff and get well-formatted conventional commit messages with scope and type.

Spec OnlyTools
T

AI Image Upscaler Local

Browser-based image upscaling using WebGPU and ONNX runtime — all processing happens locally.

Spec OnlyTools
T

AI Meeting Agenda Builder

Generate structured meeting agendas from loose topics with time estimates and action items.

Spec OnlyTools
T

AI Prompt Version Control

Track, diff, and A/B test AI prompts across models with version history and performance metrics.

Spec OnlyTools
T

AI UX Copy Generator

Generate microcopy for UI elements — buttons, tooltips, error states, success messages, and empty states.

Spec OnlyTools

Analog Clock

Beautiful analog clock with smooth sweeping second hand, multiple face styles, and world time zones. Rendered on Canvas with anti-aliased vectors. Features alarm and timer functionality.

✓ BuiltTools
Open App →

API Cost Calculator

Track and estimate OpenAI, Claude, Gemini API costs across projects.

✓ BuiltTools
Open App →

API Documentation

Generate beautiful API docs from OpenAPI specs. Built with Next.js 15.

✓ BuiltTools
Open App →
T

API Latency Dashboard

Real-time multi-endpoint latency monitor with P50/P95/P99 percentile charts. Paste API URLs and get live performance graphs.

Spec OnlyTools

API Mock Service Worker

Developer utility that uses Service Workers to intercept and mock HTTP requests for frontend testing. Define mock endpoints with custom responses, delays, and status codes. No server needed.

✓ BuiltTools
Open App →
T

API Request Builder

Visual REST and GraphQL request builder with auth, headers, body editor, and response viewer. Lightweight Postman alternative.

Spec OnlyTools

Ar Indoor Navigator

Indoor navigation tool using device motion sensors and geolocation to help users navigate large indoor spaces. Provides step-by-step directions with a compass overlay.

✓ BuiltTools
Open App →

Ascii Art Generator

Convert text and images to beautiful ASCII art

✓ BuiltTools
Open App →

Ascii Table Lookup

Reference table for ASCII codes.

✓ BuiltTools
Open App →

Aspect Ratio Calculator

Calculate and convert aspect ratios for images and video.

✓ BuiltTools
Open App →

Aspect Ratio Tool

Calculate and visualize aspect ratios. Built with Next.js 15.

✓ BuiltTools
Open App →

Audio Spectrum Analyzer

Real-time microphone audio spectrum analyzer using Web Audio API. FFT visualization in canvas with waveform, frequency bars, and spectrogram views.

✓ BuiltTools
Open App →

Audio Waveform Viewer

Upload audio files to visualize waveforms, trim clips, and export segments. Perfect for podcasters and content creators.

✓ BuiltTools
Open App →
T

Audio Waveform Visualizer

Upload audio files to visualize waveforms and spectrograms. Supports MP3, WAV, OGG with zoom, scrub, and export as PNG.

Spec OnlyTools

Barcode Generator Local

Generate standard barcodes .

✓ BuiltTools
Open App →

Barcode Price Tracker

Scan product barcodes via device camera to look up and track prices. Uses the Barcode Detection API for native barcode reading and stores price history locally.

✓ BuiltTools
Open App →

Base Converter

Convert numbers between bases . Built with Next.js 15.

✓ BuiltTools
Open App →

Base64 Encode Decode

Encode and decode Base64 strings and files.

✓ BuiltTools
Open App →

Base64 Encoder

Multi-format encoder/decoder: Base64, URL-encode, HTML entities, JWT.

✓ BuiltTools
Open App →

Base64 Image Converter

Convert images to Base64 strings and vice versa. Optimize images before encoding to save size.

✓ BuiltTools
Open App →
T

Base64 Image Encoder

The base64-image-encoder is a web application that allows users to drag and drop images to convert them into optimized Base64 data URIs. This is particularly useful for web developers looking to inlin

Spec OnlyTools
T

Battery Status API

View detailed battery level and charging status.

Spec OnlyTools
T

Bezier Curve Playground

Interactive cubic bezier curve editor for CSS animations. Drag control points, see live preview, copy CSS timing function.

Spec OnlyTools

Binary Converter

Convert between binary, hexadecimal, decimal, and octal

✓ BuiltTools
Open App →
T

Binary Text Translator

Translate text to binary and vice versa.

Spec OnlyTools
T

Bip39 Mnemonic Gen

Generate BIP39 mnemonic phrases .

Spec OnlyTools
T

Bluetooth Heart Rate Monitor

Dashboard that connects to BLE heart rate monitors and fitness trackers via Web Bluetooth API. Visualizes real-time heart rate, tracks zones, and logs workout sessions.

Spec OnlyTools

Border Radius Generator

Visual border-radius editor with individual corners. Built with Next.js 15.

✓ BuiltTools
Open App →

Box Shadow Generator

Visual CSS box-shadow creator with layered shadows

✓ BuiltTools
Open App →
T

Brand Color Accessibility Checker

Check brand colors against WCAG accessibility standards at all contrast levels.

Spec OnlyTools

Breathing Exercise Tool

Visual guided breathing aid .

✓ BuiltTools
Open App →
T

Browser Fingerprint Viewer

Shows your browser's unique fingerprint score with detailed breakdown of canvas, WebGL, fonts, and plugins contributing to it.

Spec OnlyTools
T

Browser Privacy Score

Instantly analyze browser fingerprint uniqueness and tracking exposure with privacy recommendations.

Spec OnlyTools
T

Browser Storage Quota

Check available storage quota.

Spec OnlyTools

Browser Video Editor

Client-side video trimmer and transcoder using the WebCodecs API. Trim, crop, and re-encode videos entirely in the browser — files never leave the device. Supports MP4, WebM output.

✓ BuiltTools
Open App →
T

Bundle Size Treemap

Upload a JavaScript bundle or source map to visualize every module's size as an interactive treemap with optimization suggestions.

Spec OnlyTools
T

Business Name Generator

AI-powered business name suggestions with domain availability checking and branding ideas.

Spec OnlyTools
T

Carbon Footprint Calculator

Calculate personal carbon footprint from daily habits with actionable reduction tips and visual charts.

Spec OnlyTools
T

Case Converter Pro

Convert text between camelCase, snake_case, kebab-case, PascalCase, etc.

Spec OnlyTools
T

Changelog Generator

Paste git log output or connect to a repo to generate a formatted changelog following the Keep a Changelog specification.

Spec OnlyTools
T

Changelog Generator AI

Paste git log output and get a beautifully formatted changelog grouped by type .

Spec OnlyTools
T

Changelog Widget

Generate embeddable changelog widgets for websites. Create beautiful release notes with versioning and categories.

Spec OnlyTools

Character Counter

Count characters, words, sentences with limits. Built with Next.js 15.

✓ BuiltTools
Open App →

Chmod Calculator

Unix file permission calculator with visual toggles.

✓ BuiltTools
Open App →
T

Chmod Calculator GUI

Visual permissions text to octal calculator.

Spec OnlyTools

Clip Path Editor

Visual CSS clip-path polygon editor. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Clipboard History Local

Simple clipboard logger .

Spec OnlyTools
T

Clipboard History Web

Browser-based clipboard manager using localStorage. Search, pin, tag, and manage your clipboard history privately.

Spec OnlyTools
T

Code Diff Viewer

Side-by-side and inline code diff viewer with syntax highlighting. Paste two code blocks and see changes instantly.

Spec OnlyTools
T

Code Explanation Generator

```markdown

Spec OnlyTools
T

Code Snippet Manager Pro

The code-snippet-manager-pro is a web application designed for developers to efficiently manage their code snippets. It allows users to tag snippets for easy retrieval and provides syntax highlighting

Spec OnlyTools

Codeblock Beautifier

Format and beautify code snippets with themes. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Codepoint Explorer

Explore Unicode characters by block, name, or codepoint range with copy and search functionality.

Spec OnlyTools
T

Coin Flipper Sim

Flip a coin with animation.

Spec OnlyTools
T

Color Blindness Sim

Upload images or screenshots and simulate all 8 types of color blindness in real-time using accurate color transformation matrices. Essential for accessibility testing.

Spec OnlyTools
T

Color Blindness Simulator

Upload an image or enter a URL to simulate how it appears to people with 8 types of color vision deficiency.

Spec OnlyTools

Color Contrast Checker

Check color contrast ratio for WCAG accessibility compliance.

✓ BuiltTools
Open App →
T

Color Contrast Matrix

Input a color palette and generate a full NxN contrast ratio matrix with WCAG AA/AAA pass/fail indicators for every pair.

Spec OnlyTools

Color From Image

Upload any image and extract the dominant color palette with hex, RGB, and HSL codes. Perfect for designers and developers.

✓ BuiltTools
Open App →

Color Mixer

Mix and blend colors with harmony suggestions. Built with Next.js 15.

✓ BuiltTools
Open App →

Color Name Finder

Find the closest named color for any hex value. Built with Next.js 15.

✓ BuiltTools
Open App →

Color Palette From Image

Upload an image to extract the dominant color palette using Canvas API.

✓ BuiltTools
Open App →

Color Palette Generator

Generate harmonious color palettes with various color theory rules.

✓ BuiltTools
Open App →
T

Color Palette Generator AI

AI-assisted color palette generator. Lock specific colors and generate harmonious matches.

Spec OnlyTools

Colorsnap Extension

✓ BuiltTools
Open App →
T

Commit Message Linter

Paste commit messages and validate against the Conventional Commits specification. Get instant feedback with fix suggestions and properly formatted alternatives.

Spec OnlyTools
T

Commit Msg Previewer

The commit-msg-previewer is a web application that allows users to paste their commit messages and preview how they will render on popular version control platforms such as GitHub, GitLab, and Bitbuck

Spec OnlyTools
T

Component Accessibility Auditor

The component-accessibility-auditor is a web application that enables developers to paste their React or Vue HTML code and receive AI-generated suggestions for ARIA attributes and structural changes n

Spec OnlyTools
T

Component Props Doc

Paste a React, Vue, or Svelte component to auto-generate a props documentation table with types and defaults.

Spec OnlyTools

Contract Generator

Simple legal contract templates with fill-in fields and PDF export

✓ BuiltTools
Open App →

Contrast Grid

Test color contrast across all palette combinations. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Contrast Ratio Checker

WCAG 2.1 contrast ratio checker. Pick foreground and background colors, get AA/AAA compliance status with suggestions.

Spec OnlyTools

Cors Header Builder

Design CORS response headers for your API. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Countdown Timer Offline

Set a timer with alarm sound.

Spec OnlyTools
T

Crc32 Calculator

Calculate CRC32 checksum of text or files.

Spec OnlyTools
T

Cron Builder

Visual cron expression builder — Click to select minutes/hours/days. Designed as a web project.

Spec OnlyTools

Cron Expression Builder

A visual cron schedule builder that converts human-readable selections into cron expressions and shows the next scheduled runs.

✓ BuiltTools
Open App →
T

Cron Expression Explainer

Explain Cron expressions in plain English.

Spec OnlyTools
T

Cron Schedule Explainer

Translate Cron expressions into human-readable schedules. Next run time predictor and visual calendar view.

Spec OnlyTools
T

Crontab Guru

Visual cron expression builder with natural language input, real-time next-run preview, and human-readable explanations.

Spec OnlyTools
T

Crontab Monitor

Visual cron schedule viewer with timeline showing when jobs run over 24h/week. Paste crontab and see the visual schedule.

Spec OnlyTools

Csp Generator

Content Security Policy header builder. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Csp Policy Builder

Visual Content Security Policy builder with live policy testing, violation reporting, and one-click export. Helps developers create secure CSP headers without memorizing directives.

Spec OnlyTools

CSS Animation Builder

Visual keyframe animation builder with timeline. Built with Next.js 15.

✓ BuiltTools
Open App →
T

CSS Animation Keyframe Editor

Visual CSS keyframe animation editor with timeline interface. Add keyframes, adjust easing, preview live, export CSS.

Spec OnlyTools
T

CSS Box Shadow Gen

Visual generator for CSS box-shadows.

Spec OnlyTools

CSS Box Shadow Generator

Visual CSS box-shadow builder with multiple layers.

✓ BuiltTools
Open App →
T

CSS Box Shadow Studio

Multi-layer box-shadow CSS generator with drag handles, presets, and smooth animations.

Spec OnlyTools
T

CSS Clip Path Generator

Interactive CSS clip-path editor. Choose from polygon, circle, ellipse, or inset shapes with live preview and code export.

Spec OnlyTools

CSS Filter Generator

Visual CSS filter property builder. Built with Next.js 15.

✓ BuiltTools
Open App →

CSS Flexbox Playground

Interactive CSS Flexbox layout playground.

✓ BuiltTools
Open App →
T

CSS Gradient Generator Pro

Advanced CSS gradient editor supporting linear, radial, conic, and mesh gradients. Export CSS with vendor prefixes.

Spec OnlyTools
T

CSS Grid Art Builder

```markdown

Spec OnlyTools
T

CSS Grid Builder

Visual CSS Grid generator — Drag to define grid areas. Designed as a web project.

Spec OnlyTools

CSS Grid Generator

Visual CSS Grid layout builder.

✓ BuiltTools
Open App →
T

CSS Grid Layout Generator

Visual CSS Grid layout builder. Drag and drop to create complex grid structures and export clean CSS/HTML code.

Spec OnlyTools
T

CSS Minifier Tool

Minify and optimize CSS code.

Spec OnlyTools
T

CSS Specificity Battle

Educational game where two CSS selectors face off. Guess which selector wins based on specificity, and learn through play.

Spec OnlyTools

CSS Specificity Calc

Calculate and compare CSS specificity scores. Built with Next.js 15.

✓ BuiltTools
Open App →
T

CSV Chart Builder

Upload CSV data and build interactive charts with zero coding required.

Spec OnlyTools
T

CSV Explorer

Upload CSV files and explore data with auto-type detection, filtering, sorting, charting, and export. All in-browser.

Spec OnlyTools
T

CSV Pivot Table

Upload CSV files and create interactive pivot tables. Drag fields to rows/columns/values. Filter, sort, and export results.

Spec OnlyTools
T

CSV To JSON Converter

Convert CSV data to JSON array.

Spec OnlyTools
T

CSV To Sqlite Converter

The csv-to-sqlite-converter is a web application that allows users to easily drag and drop CSV files, automatically inferring the schema of the data contained within. Once processed, users can downloa

Spec OnlyTools
T

Curl To Fetch

Convert cURL commands to JavaScript fetch.

Spec OnlyTools
T

Curl To Fetch Converter

Convert cURL commands into JavaScript Fetch, Python Requests, Go, and other language snippets.

Spec OnlyTools
T

Data Faker Generator

Generate realistic fake data in bulk with multiple locales.

Spec OnlyTools
T

Data Uri Generator

Convert images/files to Data URI strings.

Spec OnlyTools
T

Data URL Converter

Convert files to and from data URLs. Supports images, fonts, SVGs. Shows file size comparison and base64 output.

Spec OnlyTools
T

Database Schema Visualizer

Paste SQL DDL statements and auto-generate beautiful ER diagrams. Visualize tables, columns, relationships, and foreign keys.

Spec OnlyTools
T

Date Difference Calculator

Calculate duration between two dates.

Spec OnlyTools
T

Decision Spinner Wheel

Spin a wheel to make a decision.

Spec OnlyTools
T

Dependency Checker

Paste package.json and check for outdated dependencies, known vulnerabilities, and estimated bundle sizes.

Spec OnlyTools
T

Dependency Graph Viz

Paste a package.json and get an interactive dependency tree visualization with bundle size estimates, vulnerability indicators, and depth analysis.

Spec OnlyTools
T

Device Info Viewer

View browser and device capabilities.

Spec OnlyTools
T

Dice Roller Sim

Simulate rolling various dice .

Spec OnlyTools

Diff Checker

Compare two code snippets with syntax highlighting.

✓ BuiltTools
Open App →

Diff Viewer

Visual side-by-side text and code diff comparison tool

✓ BuiltTools
Open App →
T

DNS Leak Test

Test if DNS queries are leaking outside your VPN tunnel with detailed diagnostic results.

Spec OnlyTools
T

DNS Lookup

Browser-based DNS toolkit — Query A, AAAA, MX, TXT records. Designed as a web project.

Spec OnlyTools
T

DNS Lookup Tool

Look up DNS records for any domain with visual output and export.

Spec OnlyTools
T

DNS Propagation Checker

Check DNS records across 20+ global resolvers simultaneously with a visual world map showing propagation status.

Spec OnlyTools

DNS Record Builder

Visual DNS record editor. Build A, AAAA, CNAME, MX, TXT, SRV, CAA records with validation, explanations, and export to BIND zone file format.

✓ BuiltTools
Open App →
T

DNS Record Visualizer

Enter a domain to visualize its complete DNS resolution chain including A, AAAA, CNAME, MX, TXT, and NS records.

Spec OnlyTools
T

Docker Compose Builder

Visual docker-compose.yml generator with service templates, port mapping, volume configuration, and YAML preview.

Spec OnlyTools
T

Drawing App

Feature-rich browser-based drawing application using Canvas API. Includes brushes, shapes, layers, and color tools. Export artwork as PNG or SVG. All client-side, no backend needed.

Spec OnlyTools

Drum Machine

Interactive drum machine with a 16-step sequencer grid. Load drum kit sounds via Web Audio API, program beats visually, and play them in a loop. Features BPM control, multiple kits, and pattern saving

✓ BuiltTools
Open App →
T

Duplicate Line Remover

Remove duplicate lines from a text list.

Spec OnlyTools
T

Email Breach Checker

Check if an email address appears in known data breaches with risk assessment and recommendations.

Spec OnlyTools
T

Email Extractor Tool

Extract email addresses from a large block of text.

Spec OnlyTools
T

Email Header Analyzer

Paste raw email headers to see a visual hop-by-hop trace with delay analysis and SPF/DKIM/DMARC verification display.

Spec OnlyTools

Email Signature Generator

Design professional HTML email signatures with templates

✓ BuiltTools
Open App →
T

Email Template Builder

Build responsive HTML email templates with drag-and-drop blocks and preview across email clients.

Spec OnlyTools
T

Emoji Code Map

Searchable map of Emojis and their codes.

Spec OnlyTools

Emoji Picker

Searchable emoji picker with categories and copy-to-clipboard.

✓ BuiltTools
Open App →

Encoding Tool

Multi-format encoder/decoder . Built with Next.js 15.

✓ BuiltTools
Open App →
T

Env File Editor

Visual .env file editor with syntax highlighting, variable validation, encryption support, and safe team sharing via copy-paste.

Spec OnlyTools
T

Env File Manager

Compare, merge, and validate .env files across projects. Highlight missing variables, detect duplicates, and export clean configs.

Spec OnlyTools
T

Env Var Validator

Paste .env and .env.example files to detect missing variables, type mismatches, and get suggestions for safe defaults.

Spec OnlyTools
T

Exif Stripper

Privacy-focused image metadata remover. Upload photos and strip all EXIF/GPS/camera data before sharing. Processes entirely in the browser using Canvas API — images never leave the device.

Spec OnlyTools
T

Face Filter Playground

Creative app applying real-time WebGL filters and masks to detected faces in a video stream. Fun Snapchat-like face filters built entirely in the browser using Shape Detection API and Canvas/WebGL.

Spec OnlyTools
T

Factorial Calculator

Calculate factorial of a number.

Spec OnlyTools

Favicon Generator

Generate favicons from text, emoji, or uploaded images.

✓ BuiltTools
Open App →
T

Favicon Generator Pro

Upload any image and generate a complete favicon set: ICO, 16/32/48px PNGs, Apple Touch icons, and webmanifest.

Spec OnlyTools
T

Favicon Generator Tool

Generate favicon.ico and other sizes from an image.

Spec OnlyTools
T

Feature Flag Manager

Simple feature flag dashboard for small teams with LocalStorage persistence. Toggle features on/off without deployments.

Spec OnlyTools
T

Feature Flag Playground

Visual feature flag simulator. Define flags, user segments, and rollout percentages, then see how they resolve in real-time.

Spec OnlyTools
T

Fibonacci Generator

Generate Fibonacci sequence up to N.

Spec OnlyTools
T

File Encryption Web

Encrypt and decrypt files client-side using AES-256 — files never leave the browser.

Spec OnlyTools
T

File Hash Checker

Drop any file to instantly calculate SHA-256, SHA-1, MD5, and CRC32 hashes. Compare hashes to verify file integrity.

Spec OnlyTools
T

File Hash Verifier

Client-side file integrity checker. Drop any file to compute SHA-256, SHA-1, and MD5 hashes instantly using the Web Crypto API. Paste an expected hash to verify file integrity. All processing happens

Spec OnlyTools

Flexbox Playground

Interactive CSS flexbox layout builder and learning tool

✓ BuiltTools
Open App →
T

Flowchart Maker

Browser-based drag-and-drop flowchart builder using SVG. Create professional diagrams with shapes, connectors, and labels. Export to SVG or PNG. No backend — everything runs client-side.

Spec OnlyTools
T

Font Pair Finder

Browse curated Google Font pairings with live preview and CSS export.

Spec OnlyTools
T

Font Pairing Tool

Discover beautiful Google Font pairings. Preview heading + body combinations with live text samples and export CSS.

Spec OnlyTools
T

Font Subsetter

Upload a font file, select character ranges, and download a subsetted WOFF2 font that's up to 90% smaller.

Spec OnlyTools

Font Tester

Preview and compare Google Fonts side by side. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Freelance Rate Calculator

```markdown

Spec OnlyTools
T

Git Branch Namer

Generate conventional branch names from ticket descriptions, JIRA IDs, or natural language. Enforces team naming conventions automatically.

Spec OnlyTools
T

Git Commit Graph

Paste git log output and get a beautiful branch visualization.

Spec OnlyTools
T

Git Commit Msg Generator

Paste a git diff and get a well-crafted conventional commit message. Supports multiple commit styles and custom scopes.

Spec OnlyTools
T

Github Profile Analyzer

Enter a GitHub username to see a visual breakdown of languages, contribution patterns, star trends, and most active repos.

Spec OnlyTools

Github Readme Generator

Generate README.md files with sections and badges. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Github Repo Stats

Paste a GitHub repository URL and instantly see stars, forks, issues, language breakdown, contributors, and recent activity. Uses the public GitHub REST API . Beautiful data visualization with charts.

Spec OnlyTools
T

Github Stars Organizer

```markdown

Spec OnlyTools
T

Gitignore Builder

Search and combine .gitignore templates by technology stack. Preview, customize, and download the perfect .gitignore.

Spec OnlyTools
T

Gitignore Generator

Multi-language .gitignore file builder with searchable templates, custom rules, and preview with file matching test.

Spec OnlyTools

Glassmorphism Generator

Design glassmorphism UI elements with controls. Built with Next.js 15.

✓ BuiltTools
Open App →

Gradient Generator

CSS gradient builder with angle and color controls.

✓ BuiltTools
Open App →
T

Gradient Generator CSS

Create CSS gradients visually.

Spec OnlyTools
T

Gradient Mesh Generator

Generate complex CSS gradient mesh backgrounds with point-and-click color placement.

Spec OnlyTools
T

Graphviz Live Editor

Write DOT language and see graph visualization update in real-time with export options.

Spec OnlyTools

Grid Playground

Interactive CSS Grid visual builder and reference tool

✓ BuiltTools
Open App →
T

Habit Tracker Mini

Minimal daily habit tracker with streak counting and visual grid. Track multiple habits with a GitHub-style contribution grid. Uses reactive state management and LocalStorage for persistence. Fully of

Spec OnlyTools

Hash Generator

Generate MD5, SHA-1, SHA-256 hashes from text or files.

✓ BuiltTools
Open App →
T

Hash Generator Offline

Generate MD5, SHA-1, SHA-256 hashes locally.

Spec OnlyTools
T

Hex RGB Converter

Convert between HEX, RGB, HSL, and CMYK.

Spec OnlyTools
T

Hex To Ascii Converter

Convert Hexadecimal strings to ASCII text.

Spec OnlyTools
T

Hmac Generator Tool

Generate HMAC using secret key .

Spec OnlyTools

Htaccess Generator

Generate .htaccess rules from a form.

✓ BuiltTools
Open App →
T

HTML Email Previewer

Paste HTML email code and preview it as it would render in Gmail, Outlook, and Apple Mail side by side.

Spec OnlyTools

HTML Entity Converter

Convert special characters to HTML entities and back.

✓ BuiltTools
Open App →
T

HTML Entity Encoder

Convert text to HTML entities and back.

Spec OnlyTools
T

HTML Entity Lookup

```markdown

Spec OnlyTools
T

HTML Minifier Tool

Minify HTML markup.

Spec OnlyTools

HTML Preview

Live HTML/CSS/JS editor with instant preview

✓ BuiltTools
Open App →
T

HTML To Markdown Converter

Paste HTML and get clean Markdown output. Handles tables, images, links, code blocks, and nested lists accurately.

Spec OnlyTools

Htpasswd Generator

Generate Apache htpasswd entries for basic auth. Built with Next.js 15.

✓ BuiltTools
Open App →
T

HTTP Header Analyzer

Analyze any URL's response headers with security scoring, best practice recommendations, and OWASP compliance check.

Spec OnlyTools
T

HTTP Status Code Reference

Interactive HTTP status code encyclopedia with descriptions, use cases, and example response headers for each code.

Spec OnlyTools

HTTP Status Reference

Searchable HTTP status code reference guide. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Icon Font Builder

Upload SVG icons to generate a custom icon font with ligatures, preview page, and usage documentation.

Spec OnlyTools

Icon Search

Search across multiple icon libraries in one place. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Image Compression Comparison

Compare image compression algorithms side by side. Test JPEG, WebP, AVIF, PNG quality vs file size tradeoffs visually.

Spec OnlyTools
T

Image Cropper Canvas

Crop images locally using Canvas.

Spec OnlyTools
T

Image Filter Studio

Apply CSS filters to images .

Spec OnlyTools

Image Map Generator

Create HTML image maps visually. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Image Metadata Viewer

Upload images to view and optionally strip EXIF metadata including GPS location, camera info, and timestamps.

Spec OnlyTools
T

Image Resizer Canvas

Resize images to specific dimensions.

Spec OnlyTools
T

Image Sprite Packer

Drag-and-drop multiple images to generate an optimized CSS sprite sheet. Outputs the combined image and CSS classes with exact coordinates for each sprite.

Spec OnlyTools

Image To Base64

Convert images to Base64 strings and vice versa.

✓ BuiltTools
Open App →
T

Image To Base64 Tool

Convert image files to Base64 strings.

Spec OnlyTools
T

Image Watermark Tool

Client-side image watermarking tool. Add text or image watermarks to photos with full control over position, opacity, size, rotation, and tiling. Uses Canvas API — images never leave the device.

Spec OnlyTools
T

Incident Timeline

Create and share incident postmortem timelines with status updates, impact descriptions, and resolution steps.

Spec OnlyTools
T

Incognito Search Tester

```markdown

Spec OnlyTools

Input Tester

✓ BuiltTools
Open App →
T

Interactive Quiz Builder

Create and take custom quizzes with scoring, timers, and results breakdown. Build mode for creating quizzes with multiple question types. Play mode with instant feedback and score tracking. Data store

Spec OnlyTools

IP Info Viewer

Display local network info and IP-related utilities.

✓ BuiltTools
Open App →
T

IP Subnet Visualizer

Visual CIDR and subnet calculator with interactive network diagram. Calculate ranges, broadcast addresses, and usable hosts.

Spec OnlyTools
T

Js Minifier Tool

Minify JavaScript code .

Spec OnlyTools
T

JSON Db Viewer

```markdown

Spec OnlyTools
T

JSON Diff Checker

Compare two JSON objects and visualize the differences. unexpected keys, value changes, and structural mismatches.

Spec OnlyTools
T

JSON Diff Merge Tool

Visual 3-way merge tool for JSON files with conflict resolution and structured diff view.

Spec OnlyTools

JSON Diff Viewer

Paste two JSON objects side-by-side and see a beautiful tree diff with added, removed, and changed properties highlighted.

✓ BuiltTools
Open App →
T

JSON Formatter Offline

Format and validate JSON data locally.

Spec OnlyTools
T

JSON Path Finder

Paste JSON and click any value to instantly see its JSONPath expression, jq command, and JavaScript accessor syntax.

Spec OnlyTools
T

JSON Schema Faker

```markdown

Spec OnlyTools

JSON Schema Generator

Generate JSON Schema from sample JSON data. Built with Next.js 15.

✓ BuiltTools
Open App →

JSON To CSV

Convert between JSON and CSV formats.

✓ BuiltTools
Open App →
T

JSON To Typescript Interfaces

```markdown

Spec OnlyTools

JSON Tree Viewer

Visualize JSON as collapsible tree structure.

✓ BuiltTools
Open App →
T

JWT Builder Online

Create and sign JWTs with custom headers, payloads, and claims. Support for HS256, RS256 algorithms with key generation.

Spec OnlyTools
T

JWT Debugger

Offline JWT token inspector — Decode header/payload without secret. Designed as a web project.

Spec OnlyTools
T

JWT Decoder Offline

Decode JWT tokens to view header and payload.

Spec OnlyTools

JWT Generator

Create and sign JWT tokens with custom claims. Built with Next.js 15.

✓ BuiltTools
Open App →
T

JWT Visualizer Decoder

Advanced JWT decoder and debugger. Paste a token to see header, payload, and signature. Verify signatures with secret keys.

Spec OnlyTools
T

Keyboard Layout Viz

Interactive keyboard heatmap generator. Paste text and see which keys are used most, with layout optimization tips and finger travel distance calculations.

Spec OnlyTools
T

Keyboard Shortcut Reference

Searchable cheat sheets for VS Code, Vim, macOS, Chrome DevTools, Figma and more with visual keyboard layout.

Spec OnlyTools
T

Keycode Info Tool

Press any key to get JavaScript keycode info.

Spec OnlyTools

Keyframe Animator

Visual multi-step CSS keyframe editor. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Latex Equation Editor

Visual LaTeX math equation editor with real-time rendering. Toolbar for common symbols, copy LaTeX or export as PNG/SVG.

Spec OnlyTools
T

License Chooser

Interactive open-source license picker with comparison table, SPDX identifiers, and one-click LICENSE file download.

Spec OnlyTools
T

Lighthouse Dashboard

Run simulated Lighthouse-style performance audits on URLs, track scores over time with historical charts.

Spec OnlyTools
T

Linguistic Readability Analyzer

Text editor that highlights complex sentences and calculates readability scores . Helps writers simplify their prose for target audiences.

Spec OnlyTools
T

Live Poll Creator

Create interactive polls with real-time animated vote bars. Share polls via URL hash. Votes update instantly with smooth bar animations. Uses reactive state management with LocalStorage persistence —

Spec OnlyTools
T

LLM Token Counter

Multi-model token counter with cost estimation for GPT, Claude, Gemini, and other LLM providers.

Spec OnlyTools
T

Local PDF Editor

Annotate PDFs locally without uploading. Add highlights, text notes, drawings, and signatures. Privacy-first, all in browser.

Spec OnlyTools

Local Storage Manager

View and edit Local Storage for the current domain.

✓ BuiltTools
Open App →
T

Lorem Ipsum Advanced

Generate placeholder text with various options.

Spec OnlyTools

Lorem Ipsum Generator

Generate placeholder text with customizable paragraphs and formats.

✓ BuiltTools
Open App →
T

Lorem Ipsum Generator Pro

Advanced placeholder text generator. Support for multiple languages, rich text, code, and specialized jargon.

Spec OnlyTools
T

Luhn Algorithm Check

Validate numbers using Luhn algorithm .

Spec OnlyTools

Manifest Generator

Generate web app manifest.json files. Built with Next.js 15.

✓ BuiltTools
Open App →

Markdown Preview

Live Markdown editor with split-pane preview.

✓ BuiltTools
Open App →

Markdown Table Generator

Visual table editor that outputs markdown. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Markdown Table Magic

markdown-table-magic is a web application that allows users to easily convert Excel and CSV data, or messy text, into perfectly formatted Markdown tables. With intuitive alignment options and a user-f

Spec OnlyTools
T

Markdown To HTML Simple

Convert Markdown text to raw HTML.

Spec OnlyTools

Media Query Builder

Visual breakpoint and media query designer. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Media Query Tester

Test CSS media query breakpoints visually. Enter breakpoints, see which ones match current viewport, preview at different sizes.

Spec OnlyTools
T

Meeting Notes Summarizer

Paste meeting transcripts or notes and extract structured summaries with action items, decisions, and key topics using text analysis.

Spec OnlyTools
T

Memory Match Game Lite

Simple pair matching memory game.

Spec OnlyTools
T

Mermaid Live Editor

Real-time Mermaid diagram editor with syntax highlighting, auto-complete, error detection, and export to SVG/PNG.

Spec OnlyTools

Meta Tag Generator

Generate SEO meta tags, Open Graph, and Twitter cards.

✓ BuiltTools
Open App →
T

Metronome Online

Simple audio metronome.

Spec OnlyTools
T

Mime Type Lookup

Search common MIME types by extension.

Spec OnlyTools
T

Morse Code Translator

Translate text to Morse code and play sound.

Spec OnlyTools

Network Speed Test

Client-side internet speed test measuring download, upload, latency, and jitter. Pure JavaScript, no external server dependencies, privacy-respecting.

✓ BuiltTools
Open App →

Neumorphism Generator

Design neumorphic UI elements with shadow controls. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Nginx Config Generator

Generate nginx configuration files for reverse proxy, SSL, caching, and static file serving via simple forms.

Spec OnlyTools
T

NPM Package Compare

Compare two npm packages side-by-side. See download trends, bundle size, dependencies, last publish date, and popularity scores. Uses public npm and bundlephobia APIs. Helps developers choose the righ

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NPM Package Size

Check npm package size, dependency tree, and bundle impact before installing. Local-first alternative to bundlephobia.

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Number Base Converter

Convert numbers between Binary, Octal, Decimal, Hex.

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OG Image Generator

Design beautiful Open Graph social sharing cards

✓ BuiltTools
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OG Image Preview

Social media preview tool — Input URL to fetch meta tags. Designed as a web project.

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OG Meta Debugger

Enter a URL to preview Open Graph, Twitter Card, and Schema.org metadata as they appear across all social platforms.

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Online Offline Status

Test network connectivity events.

✓ BuiltTools
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Open Graph Debugger

Enter any URL and preview how it appears when shared on Twitter, Facebook, LinkedIn, and Slack. Debug and fix OG tags.

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Open Graph Preview All

Preview how any URL appears when shared on Twitter, LinkedIn, Discord, Slack, Facebook, and iMessage — all platforms shown simultaneously in one view.

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Password Entropy Calc

```markdown

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Password Strength Analyzer

Analyze password entropy and crack time. Client-side only. suggestions for improvement.

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Password Strength Checker

Test password strength with entropy calculation and suggestions.

✓ BuiltTools
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T

PDF Merger

Merge, split, and rotate PDF pages entirely client-side. No file uploads to any server — complete privacy.

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PDF Page Extractor

Client-side PDF page extraction tool. Upload a PDF, preview all pages, select specific pages, and download them as a new PDF. Uses pdf.js for rendering and jsPDF for output — files never leave the dev

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Percentage Calculator

Calculate percentage changes, fractions, and values.

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Performance Budget Calc

Define web performance budgets for LCP, FID, CLS, TTFB, and bundle sizes. Visualize targets with interactive graphs and get actionable recommendations.

✓ BuiltTools
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Permission Policy Builder

Visual Permission-Policy HTTP header builder with toggle switches for every browser API .

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Piano Keyboard

Playable virtual piano using Web Audio API. Supports mouse clicks, touch, and keyboard mapping. Features multiple instrument sounds, octave switching, and recording/playback.

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Pitch Pipe Online

Play standard musical notes for tuning.

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Pixel Art Animator

Frame-by-frame pixel art editor with animation playback. Draw on a configurable grid, create multi-frame animations, preview in real-time, and export as sprite sheet or animated GIF. All client-side u

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Pixel Art Editor

Retro pixel art canvas with layers, animation frames, and PNG/GIF export.

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Placeholder Image

Generate placeholder images with custom dimensions and text.

✓ BuiltTools
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Placeholder Image Gen

Generate placeholder image URLs.

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Placeholder Image Generator

Generate placeholder images with custom dimensions, colors, text, and formats. Copy URL or download directly.

Spec OnlyTools
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Pomodoro Spotify

Pomodoro timer that integrates with Spotify embeds — auto-plays focus playlists during work and chill playlists during breaks.

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Pomodoro Timer Lite

Simple Pomodoro focus timer.

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Prefix Suffix Adder

Add text to the beginning and end of every line.

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Pricing Table Builder

Design and export responsive pricing tables for SaaS products

✓ BuiltTools
Open App →
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Prime Factorization Tool

Find prime factors of a number.

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Prime Number Checker

Check if a number is prime and find next prime.

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Privacy Policy Gen

Generate GDPR and CCPA-compliant privacy policies from a simple questionnaire. Free, no account required, downloadable as Markdown, HTML, or plain text.

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Properties To JSON

Convert Java .properties to JSON.

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QR Code Generator

Generate customizable QR codes for URLs, text, Wi-Fi, and vCards.

✓ BuiltTools
Open App →
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QR Code Generator Local

Generate QR codes from text/URL.

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QR Code Generator Styled

Create styled QR codes with logos, colors, and custom dot shapes. Support for Wi-Fi, VCard, and URLs.

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Random Number Generator

Generate random numbers within a range.

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Random String Generator

Generate random alphanumeric strings for keys/passwords.

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Readme Badge Generator

```markdown

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Readme Generator

Form-based README.md generator with badges, TOC, and live preview.

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Readme Generator Simple

GUI to generate a standard README.md file.

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Readme Template Picker

Pick a README style template, fill in project details, and export polished markdown ready for GitHub.

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Realtime Whiteboard Collaboration

Peer-to-peer collaborative drawing and brainstorming tool using WebRTC for direct connections between users. No server needed for data — peers exchange drawing strokes in real-time via data channels.

✓ BuiltTools
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Receipt Scanner

Upload receipt photos and extract items, totals, dates, and store names into structured data. All processing happens client-side.

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Regex Crossword Generator

The Regex Crossword Generator is a web application that allows users to create and share crossword puzzles based on regular expressions. By inputting words, users can generate puzzles that not only en

Spec OnlyTools

Regex Debugger

Step-through regex with match highlighting, group capture, and explanation.

✓ BuiltTools
Open App →
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Regex Debugger Visual

Step-by-step regex execution visualizer showing match groups, backtracking, and performance.

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Regex Library Personal

```markdown

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Regex Playground

A visual regex builder and tester with live matching, group highlighting, and a cheat sheet. Paste test strings, build patterns visually, and see matches in real time.

✓ BuiltTools
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Regex Tester

Test regular expressions with live matching and group extraction.

✓ BuiltTools
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Regex Tester Simple

Test regular expressions against text.

Spec OnlyTools

Regex Visualizer

Visualize regex patterns as railroad diagrams. Built with Next.js 15.

✓ BuiltTools
Open App →
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Regex Visualizer Explainer

Interactive Regex tester that explains patterns in plain English. Type a regex and see a visual breakdown of what it matches.

Spec OnlyTools
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Release Notes Generator

Generate beautiful changelogs from conventional commits with categorization, filtering, and markdown/HTML export.

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Responsive Screenshot Grid

Enter a URL to generate side-by-side screenshots at 5 common breakpoints. Export as a comparison grid image.

Spec OnlyTools

Responsive Tester

Test any URL across multiple device resolutions. Built with Next.js 15.

✓ BuiltTools
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Resume Builder

ATS-optimized resume builder with multiple professional templates

✓ BuiltTools
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RGB Hsl Converter

Comprehensive color space converter supporting RGB, HSL, HSV, HEX, CMYK, and Lab. Copy values in any format instantly.

Spec OnlyTools

Robots Txt Generator

Generate robots.txt files for websites.

✓ BuiltTools
Open App →
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Roman Numeral Converter

Convert numbers to/from Roman numerals.

Spec OnlyTools
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Screen Resolution Test

Check current viewport and screen resolution.

Spec OnlyTools

Screen Resolution Tester

Test responsive design at different screen resolutions.

✓ BuiltTools
Open App →

Scrollbar Designer

Design custom CSS scrollbars visually. Built with Next.js 15.

✓ BuiltTools
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Secure Password Sharing

Create one-time-view encrypted password share links that self-destruct after being read.

Spec OnlyTools
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Semantic HTML Checker

Paste HTML markup and get scored on semantic correctness. Identifies div-soup, missing landmarks, heading hierarchy issues, and suggests proper semantic alternatives.

Spec OnlyTools
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SEO Schema Visualizer

Paste any URL to visualize its meta tags, Open Graph data, and structured data . See exactly how the page will appear in Google, Twitter, Facebook, and LinkedIn search results.

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Sitemap Generator

Generate XML sitemaps from URL lists.

✓ BuiltTools
Open App →
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Slugify Generator

Convert strings into URL-friendly slugs.

Spec OnlyTools
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Social Image Resizer

Crop images for specific social media sizes.

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Sound Board Maker

Create custom sound boards using the Web Audio API. Record sounds from microphone, generate tones programmatically, or upload audio files. Assign sounds to a grid of pads and trigger them with clicks

Spec OnlyTools

Spacing Calculator

Calculate consistent spacing scales for design. Built with Next.js 15.

✓ BuiltTools
Open App →
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Speech To Text Local

Browser-based speech recognition using Web Speech API. No cloud, no API keys. Real-time transcription with language selection.

Spec OnlyTools
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Speech To Text Notetaker

Accessibility-focused tool that transcribes live speech into formatted Markdown notes using the Web Speech API. Perfect for meetings, lectures, and voice memos. All processing happens in the browser.

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Speed Reading Tool

RSVP reader.

Spec OnlyTools

Sprite Sheet Viewer

View and extract sprites from sprite sheets. Built with Next.js 15.

✓ BuiltTools
Open App →

SQL Formatter

Format and beautify SQL queries with highlighting. Built with Next.js 15.

✓ BuiltTools
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SQL Formatter Tool

Format SQL queries for readability.

Spec OnlyTools
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SQL Formatter Visual

Format and beautify SQL queries with dialect support . Syntax highlighting and indentation options.

Spec OnlyTools
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SQL Query Formatter

Beautify and format complex SQL queries. specialized for PostgreSQL, MySQL, and SQLite dialects.

Spec OnlyTools
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SQL Query Optimizer AI

```markdown

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SQL To Prisma Schema

The `sql-to-prisma-schema` app allows users to paste raw SQL table definitions and instantly convert them into a formatted Prisma schema file. This tool simplifies the process of migrating from SQL to

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Sqlite Query Tester

```markdown

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Sri Hash Generator

Paste a CDN URL to generate Subresource Integrity hashes with ready-to-copy script and link tags.

Spec OnlyTools
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SSL Certificate Checker

Check SSL certificate details for any domain — expiry date, issuer, chain, and security grade.

Spec OnlyTools
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SSL Certificate Inspector

Deep-inspect any domain's SSL certificate chain, expiry dates, and security configuration.

Spec OnlyTools
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Standup Generator

Generate daily standup notes from your tasks and calendar. Quick input, formatted output ready to paste into Slack or Teams.

Spec OnlyTools

State Machine Logic Builder

Visual editor for designing state machines with drag-and-drop states, transitions, and guards. Export as XState-compatible JSON or JavaScript code. Perfect for modeling UI flows, game logic, and workf

✓ BuiltTools
Open App →

Status Page

Real-time service uptime monitoring with incident management

✓ BuiltTools
Open App →
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Stopwatch Offline

Simple browser-based stopwatch with laps.

Spec OnlyTools
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String Obfuscator

Obfuscate string data for basic hiding .

Spec OnlyTools

String Utilities

String manipulation toolkit: case, trim, count, reverse.

✓ BuiltTools
Open App →
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Subnet Calculator Ipv4

Calculate IP subnets and CIDR ranges.

Spec OnlyTools
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Subscription Tracker

Track all your subscriptions with renewal dates, monthly/annual costs, and cancel reminders. Never get surprised by a charge again.

Spec OnlyTools
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SVG Blob Generator Tool

Generate organic SVG blobs for design.

Spec OnlyTools

SVG Editor

Simple SVG drawing and editing tool.

✓ BuiltTools
Open App →
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SVG Icon Composer

Combine and customize SVG icons into new compositions with layering and color controls.

Spec OnlyTools
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SVG Icon Editor

Visual SVG path editor with live preview, node manipulation, and export to SVG/PNG.

Spec OnlyTools

SVG Optimizer

Optimize and clean SVG files. Built with Next.js 15.

✓ BuiltTools
Open App →
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SVG Path Animator

```markdown

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SVG Path Editor

Visual editor for SVG path data. Manipulate control points, adjust curves, and optimize path commands interactively.

Spec OnlyTools
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SVG To React Converter

Convert SVG markup to React JSX components. Handles attributes, styles, and generates TypeScript props interface.

Spec OnlyTools

SVG Wave Generator

Generate custom SVG waves, blobs, and gradient backgrounds for website hero sections. Adjust parameters with sliders and export as SVG or CSS.

✓ BuiltTools
Open App →

Table Generator

Generate HTML/Markdown/CSV tables visually. Built with Next.js 15.

✓ BuiltTools
Open App →

Tailwind Converter

Convert CSS to Tailwind classes and vice versa. Built with Next.js 15.

✓ BuiltTools
Open App →
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Tailwind Shade Generator

The tailwind-shade-generator is a web application that allows users to select a base color and generates a perfectly tailored 11-shade palette for Tailwind CSS v4. It leverages the power of color theo

Spec OnlyTools

Tailwind To CSS

Paste Tailwind utility classes and get the equivalent plain CSS output.

✓ BuiltTools
Open App →
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Tailwind To Vanilla

Convert Tailwind CSS class strings to equivalent vanilla CSS. Supports hover, focus, responsive breakpoints, dark mode, and complex utility combinations.

Spec OnlyTools
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TCP Flag Calculator

TCP flags reference and calculator. Convert between decimal, hex, and flag names. Visual packet header diagram.

Spec OnlyTools
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Tech Radar Builder

Build your own ThoughtWorks-style Technology Radar. Add technologies, assign rings and quadrants, export as SVG or image.

Spec OnlyTools
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Tech Stack Detector

Enter a URL to detect the framework, hosting, and analytics tools used.

Spec OnlyTools
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Terminal Portfolio

Build an interactive terminal-style portfolio website with command support.

Spec OnlyTools
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Terms Of Service Gen

Generate Terms of Service documents from simple inputs. Covers liability, intellectual property, user conduct, and termination. Free, downloadable as MD/HTML/PDF.

Spec OnlyTools
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Text Cleaner Tool

Remove special characters, extra spaces, and non-ASCII.

Spec OnlyTools
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Text Diff Checker

Compare two text blocks and highlight differences side-by-side.

Spec OnlyTools

Text Diff Tool

Compare two text blocks and highlight differences.

✓ BuiltTools
Open App →
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Text List Sorter

Sort lists of text alphabetically, numerically, or by length.

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Text Repeater Tool

Repeat a string N times with a separator.

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Text Reverser Tool

Reverse text, words, or standard/line order.

Spec OnlyTools

Text Shadow Generator

Visual CSS text-shadow builder with layers. Built with Next.js 15.

✓ BuiltTools
Open App →
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Text To Speech Playground

Test browser TTS voices with speed, pitch, and volume controls. Compare voices across languages, download as audio.

Spec OnlyTools

Timestamp Converter

Convert between Unix timestamps and human-readable dates.

✓ BuiltTools
Open App →
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Timestamp Diff Calculator

Calculate the difference between two timestamps in multiple units. Support for Unix, ISO 8601, and relative dates.

Spec OnlyTools
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Timezone Converter

Team timezone visualizer — Add multiple cities/zones. Designed as a web project.

Spec OnlyTools
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Toml To JSON

Convert TOML configuration to JSON.

Spec OnlyTools
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Toml YAML Converter

Bi-directional converter between TOML, YAML, and JSON with syntax highlighting, diff view, and error detection.

Spec OnlyTools
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Toml YAML JSON Converter

Convert between TOML, YAML, JSON, and INI config file formats. Validate syntax, preserve comments where possible.

Spec OnlyTools
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Totp Generator Local

Offline TOTP/HOTP 2FA code generator. Import secrets via QR scan or manual entry, generate time-based codes — no cloud, no account, fully local.

Spec OnlyTools

Transition Generator

Visual CSS transition property builder. Built with Next.js 15.

✓ BuiltTools
Open App →
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Tsconfig Generator

Interactive tsconfig.json builder with explanations for every option, presets for popular frameworks, and compatibility warnings.

Spec OnlyTools
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Two Factor Setup Guide

Interactive two-factor authentication setup guide for popular services with security tips.

Spec OnlyTools
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Typing Speed Test

Test typing speed with simple texts.

Spec OnlyTools

Typography Scale

Generate modular type scales with preview. Built with Next.js 15.

✓ BuiltTools
Open App →
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UI Spacing Calculator

Calculate consistent spacing scales for design systems using 4px and 8px grid systems.

Spec OnlyTools
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Ulid Generator Tool

Generate Universally Unique Lexicographically Sortable Identifier.

Spec OnlyTools
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Unicode Char Picker

Search and copy Unicode characters and emojis.

Spec OnlyTools

Unit Converter

Convert between units: length, weight, temperature, data, time.

✓ BuiltTools
Open App →
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Unit Converter All

Convert Length, Weight, Volume, Temperature, etc.

Spec OnlyTools
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Unix Timestamp Converter

Convert Unix timestamps to human dates and vice versa.

Spec OnlyTools
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URL Encoder Decoder

Encode and decode URL parameters.

Spec OnlyTools
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URL Param Builder

```markdown

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URL Parser Pro

Parse URLs into components .

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URL Shortener

A URL shortening service with click analytics and custom short codes.

✓ BuiltTools
Open App →
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URL Shortener Local

URL shortener using LocalStorage. Create short links, track click counts, manage links. All data stays in browser.

Spec OnlyTools
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User Agent Parser

Parse User Agent string locally.

Spec OnlyTools

Uuid Generator

Generate UUIDs in multiple versions and formats. Built with Next.js 15.

✓ BuiltTools
Open App →

Uuid Generator Tool

Generate UUID v1, v4, and v7 identifiers.

✓ BuiltTools
Open App →
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Uuid Guid Generator

Bulk generate UUIDs and GUIDs. Copy formats for SQL, JSON, or code.

Spec OnlyTools
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UX Microcopy Refiner

```markdown

Spec OnlyTools

Variable Font Tester

Explore variable font axes interactively. Built with Next.js 15.

✓ BuiltTools
Open App →
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Wake Lock Status

Toggle screen wake lock .

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Wasm Playground

Run and test WebAssembly code snippets directly in the browser. Write WAT , compile to Wasm, and inspect memory/exports interactively.

Spec OnlyTools

Weather App

A weather app that fetches real weather data from a free API. No frameworks.

✓ BuiltTools
Open App →
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Web Accessibility Scanner

Scan any webpage for WCAG 2.1 violations. Generate reports with severity levels, affected elements, and fix suggestions.

Spec OnlyTools
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Web Manifest Validator

Upload or paste a manifest.json to validate against the PWA spec. Check icons, display modes, and get actionable fix suggestions.

Spec OnlyTools
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Web Vitals Checker

Enter a URL to get Core Web Vitals scores with improvement suggestions.

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Webauthn Playground

Interactive WebAuthn/Passkey testing sandbox. Register credentials, authenticate, and inspect CBOR responses — all in the browser with no server required.

Spec OnlyTools

Webfont Converter

Convert fonts to web-optimized formats. Built with Next.js 15.

✓ BuiltTools
Open App →
T

Webhook Payload Gen

Generate realistic sample webhook payloads for GitHub, Stripe, Twilio, SendGrid, and more. Test your webhook handlers offline with production-like data.

Spec OnlyTools

Webhook Tester

Test and debug webhooks with request inspection. Built with Next.js 15.

✓ BuiltTools
Open App →
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Webp Converter

Batch convert images between WebP, PNG, JPEG, and AVIF formats. All processing happens in-browser — no upload needed.

Spec OnlyTools
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Webp Converter Local

Convert images to and from WebP format entirely in the browser. Batch convert, adjust quality, compare file sizes.

Spec OnlyTools
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Webpack Config Generator

Visual webpack and Vite configuration builder with plugin browser, loader selection, and one-click export.

Spec OnlyTools
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Whois Lookup Tool

Domain WHOIS lookup with parsed, human-readable results. Show registrar, dates, nameservers, and domain status.

Spec OnlyTools
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Word Character Counter

Real-time count of words, characters, sentences, and paragraphs.

Spec OnlyTools
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XML Formatter Offline

Prettify and minify XML strings.

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XML To JSON Visualizer

```markdown

Spec OnlyTools
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YAML Formatter Strict

```markdown

Spec OnlyTools
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YAML JSON Converter

Convert between YAML and JSON formats.

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YAML Validator

Validate and format YAML with error highlighting.

✓ BuiltTools
Open App →
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Z Index Visual Stack

```markdown

Spec OnlyTools