JWT Decoder
Decode JWT headers and payloads and check expiry. Nothing is sent anywhere.
Runs on your device · no upload
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About JWT Decoder
JWT Decoder reads the header and payload of a JSON Web Token and tells you whether it has expired. It does not verify the signature, and your token stays in your browser.
1
Paste your input
Everything runs in your browser. Nothing is sent anywhere.
2
Get the result
Copy it with one tap.
3
Download
Save the result. No watermark, no sign-up.
Frequently asked questions
Does it verify the signature?
No. It only decodes the header and payload.
Is it safe to paste my token?
Decoding happens locally in your browser and nothing is sent to a server.
Are my files uploaded anywhere?
No. This tool runs in your browser, so your file stays on your device and is never sent to a server.