JWT Decoder Tool
Paste your JSON Web Token (JWT) below to decode its header, payload, and signature. This tool works entirely in your browser - no data is sent to any server.
Input JWT
Decoded JWT
Header
Decoded header will appear here
Payload
Decoded payload will appear here
Signature
Signature will appear here
About JWT (JSON Web Tokens)
JSON Web Token (JWT) is an open standard that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.
A JWT consists of three parts separated by dots:
- Header: Typically consists of two parts - the type of token (JWT) and the signing algorithm being used.
- Payload: Contains the claims, which are statements about an entity (typically the user) and additional metadata.
- Signature: Used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.
Note: This tool only decodes the token. It does not verify the signature as that requires the secret key.