JWT Tool

Use this tool to decode an existing JSON Web Token (JWT) or generate a new one. Switch between "Decode" and "Generate" modes below.

About This Tool

How to Use
  1. Paste a JWT token into the input field
  2. The header, payload, and signature are decoded automatically
  3. Review the claims in the payload section
  4. Check the algorithm in the header
Common Use Cases
  • Debugging authentication issues in web applications
  • Inspecting token expiration times
  • Verifying token claims during API development
  • Understanding OAuth2 access token contents
Tips & Tricks
  • JWT tokens have three parts separated by dots
  • The signature is NOT verified — this tool only decodes

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