JWT Decoder & Inspector

Paste a JSON Web Token to decode its header and payload, see the algorithm and claims, and check expiry (exp/iat) at a glance. Decoding happens locally in your browser — your token is never sent anywhere.

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About the JWT Decoder & Inspector

The JWT Decoder & Inspector unpacks any JSON Web Token so you can read its header and payload, see the signing algorithm and every claim, and instantly tell whether the token has expired from its exp and iat timestamps. Paste a token from an Authorization header or a login response and read exactly what your API is receiving — no more guessing why a request is rejected.

This free tool by Hosting Cambodia decodes tokens entirely in your browser. Your JWT — which is effectively a live credential — is never transmitted to any server, so it's safe to inspect production tokens while debugging.

Frequently asked questions

Does this verify the token's signature?

No. It decodes and displays the header and payload, which are Base64URL-encoded (not encrypted). Verifying the signature requires the secret or public key and should be done on your server.

Is it safe to paste a real token here?

Yes — decoding happens locally in your browser and nothing is uploaded. That said, treat any token as a live credential and avoid pasting one into tools you don't trust.

How do I know if a token is expired?

The tool reads the exp (expiry) and iat (issued-at) claims, converts them to readable dates and clearly flags whether the token is still valid or has already expired.

Explore the full free web tools toolbox by Hosting Cambodia.