JWT Token Debugger

Decode JSON Web Tokens (JWT) client-side in real-time. Inspect authorization payloads, header configurations, and expiration claims securely.

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About JWT Token Debugger

A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. The claims in a JWT are encoded as a JSON object that is digitally signed.

JWTs are encoded as Base64 strings, NOT encrypted. Any user possessing the token string can read the claims header and payload directly. This debugger decodes token segments completely client-side in the browser, ensuring token keys never travel to servers.