JWT Decoder

Inspect any JWT — header, payload, and signature — without sending it to any server.

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JWT Decoder

Decode JSON Web Tokens locally — header, payload, and signature. Nothing leaves your browser.

Waiting for a token…

How to use JWT Decoder

1
Paste your JWT
Drop the full token (three dot-separated parts) into the input.
2
Inspect each segment
Header, payload, and signature are decoded and pretty-printed instantly.
3
Check the timestamps
Issued-at, not-before, and expiration are converted to your local time, with an Active / Expired badge.
4
Copy any segment
One click copies just the header, the payload, or the raw signature.

About JWT Decoder

Inspect any JWT — header, payload, and signature — without sending it to any server.

Use JWT Decoder when you need to decode jwt tokens client-side. Review the available options in the interface, process your input, and check the result before saving or copying it.

Frequently asked questions

No. Signature verification requires the issuer's secret or public key. This tool decodes and inspects the token but does not validate the cryptographic signature — never trust a JWT just because it parses.