The developer toolbelt
Fast, private developer tools.
Clean, instant utilities that run entirely in your browser. No signup, no uploads, nothing stored on a server. Just paste and go.
JSON
Encoding
Base64 Encode / Decode
Encode or decode Base64, text or files, instantly.
URL Encoder / Decoder
Percent-encode or decode text and URLs, instantly.
JWT Decoder
Decode & inspect JSON Web Tokens, locally.
JWT Debugger
See why a JWT is rejected and test it for weak secrets, offline.
Hash Generator
MD5, SHA hashes, and HMAC — generate and verify, instantly.