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About JWT Decoder

Decode and inspect JSON Web Tokens (JWT) without the secret key. View header, payload, claims, and check expiration status. Essential for debugging authentication.

How to Use

  1. 1Paste your JWT token
  2. 2View decoded header and payload
  3. 3Check expiration status
  4. 4Inspect all claims

Key Features

  • Header decoding
  • Payload inspection
  • Expiration checking
  • Claims display
  • Algorithm identification
  • Pretty JSON formatting

Common Use Cases

Debugging authenticationVerifying token contentsAPI developmentSecurity analysisLearning JWT structure

Privacy First

All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.

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