JWT Decoder
Decode JWT tokens instantly in your browser. Free online JWT decoder — inspect header and payload, check expiry, no signup and no server upload.
Processed locally in your browserHow?
This tool runs in this browser tab. The files, text and values you enter are not uploaded to clkr.work servers — closing the tab clears them. Anonymous usage events (such as which button was pressed) are counted, never your content. Privacy policy
What next?
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Free, no sign-up, works in the browser — send it to a friend or add it to your site.
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Part of the toolkit
How to use JWT Decoder
- 1Paste your JWT into the box
- 2Click Decode to view header and payload as JSON
- 3Copy either section, or check expiry timestamps shown above the payload
Frequently asked questions
Is my JWT uploaded?▾
No. Decoding runs entirely in your browser. The token never leaves your device.
Does this verify the signature?▾
No. It only decodes base64url header/payload for inspection. Verification would need a secret or public key — we deliberately do not ask for keys.
Why show expiry?▾
If the payload includes exp/iat/nbf claims, we translate them to local time so you can see whether the token is still valid.
Is it free?▾
Yes. No account, no limits.
Embed JWT Decoder on your website▾
Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.