Free Online JWT Debugger and Decoder Tool
decode and inspect json web tokens securely. 100% client-side parsing for absolute privacy.
encoded token
decoded header
decoded payload
decode and inspect json web tokens securely. 100% client-side parsing for absolute privacy.
JSON Web Tokens (JWT) are a critical part of modern web security and authentication. However, debugging them can be risky if you use tools that upload your token to a server. Our free online JWT debugger provides a 100% client-side solution. By parsing the token directly in your browser, we ensure that your signature secrets and user claims never leave your device. Simply paste your token to instantly see the algorithm, expiration time, and data payload.
A JWT consists of three base64-encoded segments: the Header (specifying the signing algorithm), the Payload (containing the actual claims), and the Signature. Our debugger identifies these components and presents them in a clean, structured JSON format for easy inspection.
No. All decoding logic is executed using client-side JavaScript. There is no backend logic involved in the parsing process, ensuring your data remains anonymous and secure.
The exp (expiration time) claim identifies the expiration time on or after which the JWT must not be accepted for processing. Our tool automatically converts this Unix timestamp into your local date and time for easier reading.