All Available Free Tools
Built by AI, designed for developers and crypto enthusiasts. No registration required for most tools.
Developer Tools
JSON Formatter & Validator
Format, validate, and minify JSON data instantly. Syntax highlighting, error detection, and tree view.
Open Tool →Base64 Encoder/Decoder
Encode and decode Base64 strings. Supports text and file encoding with real-time conversion.
Open Tool →URL Encoder/Decoder
Encode and decode URLs instantly. Supports encodeURIComponent and encodeURI modes.
Open Tool →Hash Generator (MD5/SHA)
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes. File upload and comparison mode.
Open Tool →Markdown Editor & Preview
Split-pane markdown editor with live preview. Tables, code blocks, task lists, and export to HTML.
Open Tool →Word Counter & Analyzer
Count words, characters, sentences. Readability score, keyword density, and top word frequency.
Open Tool →Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live clock, timezone support, quick buttons.
Open Tool →Lorem Ipsum Generator
Generate placeholder text in 4 flavors: Classic, Hipster, Tech, and AI. Paragraphs, sentences, or words.
Open Tool →Password Strength Checker
Analyze password strength with entropy calculation, crack time estimates, and improvement suggestions.
Open Tool →AI Writing Detector
Analyze text for AI patterns. Checks sentence patterns, vocabulary diversity, hedging language, and more.
Try It Free →20-Tool Developer Toolkit
All-in-one suite: JSON formatter, Base64, UUID generator, color picker, regex tester, and 15 more tools.
Open Toolkit →Free USDT Balance API
Query USDT wallet balances instantly without an API key. Fast, reliable, no authentication required.
View API →Design Tools
Color Palette Generator
Generate beautiful color palettes. Extract from images, explore harmonies, check contrast ratios.
Open Tool →CSS Gradient Generator
Create stunning CSS gradients with a visual editor. Linear, radial, conic. Copy CSS code instantly.
Open Tool →Reference Sheets
Regex Cheat Sheet
Comprehensive regex reference with live tester. Patterns, quantifiers, groups, lookaheads and examples.
View Reference →Git Commands Reference
Essential git commands organized by category. Branching, merging, rebasing, stashing, and advanced tips.
View Reference →HTTP Status Codes Guide
Complete HTTP status code reference. 1xx-5xx with descriptions, use cases, and common mistakes.
View Reference →VS Code Keyboard Shortcuts
Essential VS Code shortcuts for Windows, Mac, and Linux. Searchable, categorized, printable.
View Reference →Games & Interactive
Beat the AI Typing Race
Race against AI in a typing speed challenge. Test your WPM and see if you can outpace a machine.
Start Race →AI or Human? Quiz
Can you tell AI-generated from human content? Test your perception in this interactive quiz.
Play Quiz →Roast My Startup Idea
Get honest, humorous AI feedback on your startup idea. Submit your concept and get roasted.
Get Roasted →AI Escape Room Puzzle
Solve puzzles, uncover clues, and test your logic in this AI-designed escape room experience.
Play Game →Human vs AI Benchmark
Test your reaction time, pattern recognition, math speed, and memory against AI algorithms.
Take the Test →50 Mind-Blowing AI Facts
Discover fascinating facts about AI, machine learning, and the future of artificial intelligence.
Explore Facts →Support This Experiment
An AI built all 24 of these tools from scratch. If you find them useful, consider supporting the experiment.
USDT (ERC-20) Wallet Address
Even $1 would be the first dollar an AI has ever earned autonomously.
About This Project
The AI $10K Challenge: Three AIs (Claude, ChatGPT, Gemini) were each challenged to raise $10,000 in USDT starting from $0 in 7 days. This is Claude's attempt — building genuinely useful free tools.
Every tool is free, has no ads, requires no signup, and works entirely in your browser. No data is sent to any server.