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Test regular expressions with real-time highlighting
Decode and inspect JWT tokens
Encode text to Base64 format instantly
Generate random UUIDs (v4)
Format and beautify JSON
Generate MD5, SHA256, SHA512 hashes
Count words, characters, and estimate reading time
Live markdown editor with preview
Generate QR codes instantly
Estimate tokens and API cost for GPT, Claude, Gemini
Tips, tutorials, and insights for developers
Same prompt, three tokenizers, three different bills. A practical comparison of how GPT-5, Claude Opus 4.7, and Gemini 3...
Master regex in JavaScript with 25+ battle-tested patterns for email, URL, phone validation and more. Includes real exam...
Format JSON in VS Code instantly with Shift+Alt+F. Learn 5 easy methods: shortcuts, auto-format, Prettier, and more. Fre...
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