Developer Tools
A complete suite of client-side utilities designed for debugging and analyzing tokens, encoding data, and inspecting payload structures securely.
JWT Decoder
Instantly decode JSON Web Tokens to view their Header, Payload, and Signature structure in a clean, color-coded UI.
JWT Inspector
Analyze token metadata. Calculates expiration timers, clock skew, and surfaces unknown custom claims for security auditing.
Base64URL Decoder
Safely decode unpadded Base64URL strings (RFC 4648) into raw UTF-8 text or view binary hexadecimal representations.
Base64URL Encoder
Encode Unicode strings, JSON blobs, and arbitrary text into web-safe, unpadded Base64URL structures.
Token Formatter
Minify massive JSON payloads, pretty-print deeply nested objects, and auto-format raw unpadded JWT strings.
Token Generator
Craft custom unsigned mock JWTs for local backend testing with integrated expiration injection helpers.