JWT Decoder
Paste a token to see its three parts separated, the claims expanded, and exp/nbf/iat rendered as local dates. Nothing leaves your browser.
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Nothing you enter here is sent anywhere. There is no file and no request to our server - the work is done in your browser and disappears when you close the page.
How It Works
- Paste — Type or paste your text into the box above.
- Configure — Choose the transformation you want.
- Run — Press the action button; the counters update as you type.
- Take it — Copy the result or download it as a file.
Frequently Asked Questions
Does this verify the token signature?
No. It decodes the header and payload so you can read the claims, and shows the signature unchanged. Verification needs the signing key and is not performed here.
Is it safe to paste a real token?
A JWT can contain personal data. Decoding happens locally in your browser and the token is never transmitted, but avoid pasting production secrets into any tool you do not control.