Instantly decode and read JSON Web Token headers, payloads, and claims securely in your browser.
What we do
Paste any Base64Url encoded JSON Web Token. Our engine instantly splits the string and decodes the Header and Payload into readable, indented JSON objects.
Standard JWTs use Unix Timestamps for their expiration (exp) and issued at (iat) claims. We automatically translate those into your local timezone human-readable dates.
Unlike standard basic decoders, our tool safely parses UTF-8 characters. If your token payload contains foreign names, symbols, or emojis, they will render perfectly.
We integrated the premium CodeMirror engine to provide real-time syntax coloring for your decoded JSON, making it incredibly easy to inspect variables and arrays.
Our Smart Claims Analyzer looks at the token's signature time and instantly alerts you if the token is currently Active or if it has already Expired.
Session tokens are highly sensitive. This tool runs entirely Client-Side inside your browser. Your JWTs are never uploaded to our server or saved in any database.