JWT Decoder

Decode JSON Web Tokens (JWT) safely and instantly. Inspect header, payload, and verify signature structures entirely client-side.

Encoded JWT Token
Header ALGORITHM & TOKEN TYPE
Payload DATA
Signature VERIFICATION

About JWT Tokens

A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. The token consists of three parts:

  • Header: Contains the type of token and the hashing algorithm being used (e.g., HMAC SHA256 or RSA).
  • Payload: Contains the claims or statements about an entity (typically, the user) and additional data.
  • Signature: Used to verify the message wasn't changed along the way.

Security Note: This tool decodes the token so you can read the data. It does not verify the signature. Decoding is done 100% locally in your browser.

ESC