JWT Decoder & Secret Generator

Decode JSON Web Tokens (JWT) and generate secure secrets for signing. Client-side only, no data is sent to any server.

JWT Token

Secret Generator

163264

About JWT

JSON Web Token (JWT) is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object.

Structure: A JWT consists of three parts separated by dots:

  • Header: Contains metadata about the token (algorithm, type)
  • Payload: Contains the claims (user data, permissions, etc.)
  • Signature: Ensures the token hasn't been tampered with

Privacy: All decoding happens in your browser. No data is sent to any server.