JWT Decoder
Decode a JWT to read its header and payload.
Keep or share the finished result
Copy or share after running the tool. Saved tools and settings stay in this browser.
What would you like to do next?
Decode a JWT
Paste a JSON Web Token above to decode its header and payload into readable, formatted JSON. A JWT has three dot-separated parts, and this tool decodes the first two so you can inspect the claims, such as the subject, issuer and expiry. Everything runs in your browser, so the token is never sent anywhere.
Signature is not verified
This tool only decodes the token for reading. It does not check the signature, which would require the secret or key used to sign it.
Frequently asked questions
Does it verify the signature?
No. It decodes the header and payload for reading only. Verifying the signature needs the signing secret or key.
Is my token uploaded?
No. Decoding happens entirely in your browser, so the token and its claims never leave your device.