🇬🇧WebFileTools/JWT Decoder
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🔑 JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and check expiration. 100% browser-based.

What is JWT Decoder?

WebFileTools JWT Decoder lets you inspect the header and payload of a JSON Web Token without installing any tool.

How to use this tool?

Paste your JWT token. The header and payload are decoded instantly with syntax highlighting.

Benefits

  • Instant header + payload decoding
  • Expiration detection
  • JSON syntax highlighting
  • 100% local — no upload

Frequently Asked Questions

Is my token sent to a server?
No, decoding is done entirely in your browser. No data is transmitted.
Is the JWT cryptographically verified?
No, the tool decodes and displays the content without verifying the signature.
Can I check if my token is expired?
Yes, exp and iat fields are converted to readable dates and expiration is visually indicated.

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