JWT Decoder

Decode and inspect JSON Web Tokens (JWT) to view header, payload, and signature. Perfect for debugging authentication tokens.

JWT Token Input

About JWT Decoder

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. JWTs consist of three parts: Header, Payload, and Signature.

How to Use the JWT Decoder

  1. Paste your JWT token in the input area
  2. Click "Decode JWT" to decode the token
  3. View the decoded header, payload, and signature
  4. Click "Copy" next to any section to copy it to clipboard
  5. Use "Clear" to reset and decode another token

Features & Benefits

  • Decode Header: View algorithm and token type
  • Decode Payload: Inspect claims and user data
  • View Signature: See the encoded signature
  • Copy Individual Parts: Copy header, payload, or signature
  • Secure & Private: All decoding happens in your browser

Common Use Cases

  • Debugging authentication tokens
  • Inspecting API access tokens
  • Verifying token claims and expiration
  • Understanding JWT structure
  • Testing OAuth and SSO implementations
  • Troubleshooting authorization issues