20 free toolsfor developers
Format JSON, decode JWTs, generate UUIDs, review code, analyze prompts, and more. No login. No API key. Works offline.
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Free tools
100% open source
No API key required
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20 powerful tools
No login required. Everything runs in your browser.
Prompt Analyzer
Analyze prompt quality, detect vulnerabilities, and optimize.
Code Review Assistant
Automated code quality reviews with AI-powered suggestions.
API Cost Calculator
Compare costs across AI providers in real time.
Token Visualizer
Real-time token counting and visualization.
Context Manager
Organize and optimize your LLM context windows.
Regex Humanizer
Explain regex in plain language, generate patterns from descriptions.
DTO-Matic
Convert JSON to TypeScript interfaces, entities, and mappers instantly.
Cron Builder
Visual cron expression builder with human-readable explanations.
Tailwind Sorter
Sort and organize your Tailwind CSS classes automatically.
Variable Name Wizard
Generate perfect variable names and convert between conventions.
JSON Formatter
Format, minify, and validate JSON with path extraction and TypeScript generation.
Base64 Encoder/Decoder
Encode and decode Base64 with URL-safe variant and data URL support.
UUID Generator
Generate, validate, and analyze UUIDs in all versions and formats.
Git Commit Generator
Generate conventional commit messages with type, scope, and validation.
HTTP Status Finder
Search and learn about HTTP status codes with examples and tips.
Hash Generator
Generate and verify hashes with MD5, SHA-1, SHA-256, SHA-384, SHA-512.
JWT Decoder
Decode, inspect, and validate JSON Web Tokens instantly.
Color Converter
Convert colors between HEX, RGB, HSL, OKLCH, and HWB formats.
Diff Comparer
Compare two texts side by side and see the differences.
Password Generator
Generate strong, cryptographically secure passwords.
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