JWT Decoder
Decode a JWT to read its header, payload, claims and expiry.
JWT Decoder
Paste a JSON Web Token to decode its header and payload and read the claims. Decoding happens entirely in your browser — your token is never sent anywhere.
About JWT Decoder
The JWT Decoder decodes a JSON Web Token into its header and payload so you can read the claims, the issued-at and expiry times, and check whether the token has expired. Decoding runs entirely in your browser — your token is never sent to a server. It does not verify the signature.
How to use JWT Decoder
- Paste your JWT (header.payload.signature).
- Read the decoded header and payload.
- Check the issued-at and expiry times and whether the token is still valid.
Frequently asked questions
Does this verify the JWT signature?
No. It only decodes the token to show its contents. A JWT’s authenticity must be verified on your server using the secret or public key — never trust decoded claims without verifying the signature.
Is my token sent anywhere?
No. Decoding happens entirely in your browser; the token never leaves your device.
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