JWT Decoder

Decode and inspect the payload of JSON Web Tokens instantly. **Data stays in your browser.**

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Encoded JWT

Header

Payload (Data)

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Inspect JWT Payloads Securely

JSON Web Tokens (JWT) are widely used for authentication. Our Free JWT Decoder lets you see the decoded Header and Payload (claims) without needing a secret key.

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Privacy First

WARNING: Never paste your JWT into a tool that sends data to a server. Our JWT Decoder is 100% Secure because it runs offline in your browser. We never see your token.

Why is it Free?

DevTools Studio is committed to providing essential security tools for free. Debug your authorization headers, check token expiration, and verify user IDs at no cost.

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JWT Debugging Features

  • Header Inspection: View algorithm and token type.
  • Payload Decoding: See all claims and custom data.
  • Expiration Checking: Verify token validity periods.
  • Signature Display: View the signature component.
  • No Server Upload: 100% client-side processing for security.
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