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Developer Tools
Essential utilities for developers - JSON, Base64, JWT, regex, hash, UUID, and more.
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JSON Formatter
Format, validate, and beautify JSON online for free. Instantly pretty-print or minify JSON with syntax highlighting.
B64
Base64 Encode/Decode
Encode or decode Base64 strings online instantly. Free Base64 encoder and decoder with URL-safe mode support.
JWT
JWT Decoder
Decode and inspect JWT tokens online. View header, payload, and signature of any JSON Web Token instantly.
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UUID Generator
Generate random UUID v4 strings online. Create single or bulk UUIDs instantly for free.
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Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online. Free cryptographic hash calculator.
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URL Encoder/Decoder
Encode or decode URLs online for free. Percent-encode special characters or decode encoded URL strings instantly.
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HTML Encoder/Decoder
Encode or decode HTML entities online. Convert special characters to HTML entities and back.
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Regex Tester
Test and debug regular expressions online. Real-time regex matching with match highlighting and group capture display.
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Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Current timestamp, epoch converter online.
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Color Converter
Convert colors between HEX, RGB, HSL, and RGBA formats online. Free color picker and converter.