Secure JWT Decoder

Paste a JSON Web Token below. Decoding happens entirely in your browser.

Header

Waiting for token...

Payload

Waiting for token...

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What is a JSON Web Token (JWT)?

A JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.

Why use a Client-Side Decoder?

Security is paramount when handling authentication tokens. Many online decoders send your token to a backend server, potentially exposing sensitive session data or user information. Our tool runs 100% client-side using JavaScript. Your token never leaves your device, ensuring complete data privacy for developers and sysadmins.