JWT Decoder
How to Use
- Paste your JWT token into the input field
- The token is automatically decoded into Header, Payload, and Signature sections
- Inspect the claims in the Payload (e.g. sub, exp, iat, roles)
- Check the expiry status indicator at the top of the results
- Use the Copy button next to each section to copy the decoded JSON
Frequently Asked Questions
Does this tool verify the JWT signature?
No. This tool only decodes and displays the token contents. Signature verification requires the secret key and is not performed here.
Is my token sent to a server?
No. All decoding happens locally in your browser. Your token never leaves your device.
What is a JWT?
A JSON Web Token (JWT) is a compact token used to represent claims between parties. It consists of a Base64URL-encoded Header, Payload, and Signature separated by dots.
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