AI-Powered Developer Tools
Free, fast, and privacy-first tools for developers. Format JSON, test regex, generate UUIDs, decode JWTs, and more — all in your browser.
JSON Formatter
Format, validate, and beautify JSON with tree view and TypeScript type generation.
Regex Tester
Test regular expressions with real-time matching, capture groups, and code snippets.
UUID Generator
Generate UUID v4, v7, ULID, and Nano ID with bulk generation and format options.
Base64 Encoder/Decoder
Encode and decode text, images, and files to Base64 with real-time conversion.
JWT Decoder
Decode, inspect, and verify JWT tokens with claim explanations and expiration check.
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Cron Expression Generator
Build cron expressions visually with next run preview and code snippets.
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CLAUDE.md Generator
Generate the perfect CLAUDE.md for your project with AI assistance.
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Git Command Generator
Find the right git command with natural language search and safety warnings.
Tailwind Palette Generator
Generate custom color palettes for Tailwind CSS with accessibility checks.
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README.md Generator
Create professional README.md files with templates and live preview.
Color Converter
Convert colors between HEX, RGB, HSL, CMYK with Tailwind matching and WCAG contrast check.
URL Encoder/Decoder
Encode and decode URLs with query string parser and URL structure analysis.
HTML Entity Encoder/Decoder
Encode and decode HTML entities with XSS prevention guide and 2000+ entity reference.
Markdown Preview
Live markdown editor with GitHub/Notion themes, code highlighting, KaTeX math, and Mermaid diagrams.
Diff Checker
Compare text and code with side-by-side, inline, and unified views plus change highlighting.