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JWT Decoder

Online tool to decode JSON Web Token (JWT) Header and Payload content. All operations are performed locally, secure and reliable.

Input JWT Token

Features​

  • 🔒 Local Processing: All operations are done in browser, token is never uploaded
  • ⚡ Real-time Decoding: View results instantly as you type
  • 🎨 Formatted Display: Automatically format JSON data for better readability
  • 📋 Error Prompts: Clear error messages for invalid formats

About JWT​

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. A JWT consists of three parts:

  1. Header: Contains token type and signing algorithm
  2. Payload: Contains the claims
  3. Signature: Used to verify the message hasn't been changed along the way