Developer Tools
JSON, Base64, hashing, regex — essential tools for developers.
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting.
FreeBase64 Encoder/Decoder
Encode and decode text or files in Base64 format.
FreeHash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.
FreeURL Encoder/Decoder
Encode and decode URLs and query parameters.
FreeRegex Tester
Test regular expressions with real-time matching and highlighting.
FreeJWT Decoder
Decode and inspect JSON Web Tokens without verification.
Essential Developer Utilities
Built by developers, for developers. Our JSON formatter validates against RFC 8259 and handles files up to 10 MB. The Base64 encoder supports both text and binary data, following RFC 4648. Hash generation uses the Web Crypto API for secure, standards-compliant output (MD5, SHA-1, SHA-256, SHA-512).
The regex tester supports JavaScript regex syntax with real-time match highlighting and capture group extraction. All tools work offline once loaded — ideal for working with sensitive data in air-gapped environments.