JWT Debugger

Decode and verify JWT tokens to inspect their contents and validate signatures.

Features of JWT Debugger

Token Analysis

  • Header inspection and validation
  • Payload content examination
  • Signature verification
  • Token expiration checking

Security Features

  • Algorithm verification
  • Tamper detection
  • Expiration validation
  • Claim verification

Debugging Tools

  • JSON formatting
  • Base64 decoding
  • Timestamp conversion
  • Error highlighting

User Features

  • Copy to clipboard function
  • Syntax highlighting
  • Real-time validation
  • Token structure visualization

How to Use

  1. Paste your JWT token in the input field
  2. Click "Decode Token" to analyze
  3. Review header information and claims
  4. Verify signature status
  5. Check token expiration details

Common Use Cases

  • API authentication debugging
  • Token validation during development
  • Security testing and verification
  • OAuth token inspection
  • Session token troubleshooting