JWT decoder
Query the header and payload of a JWT without sending it to a server.
Processed on this device. The files are not sent to a server.
How to use this tool
- Enter the input data.
- Review the updated result and the tool limits.
- Copy or download the resulting text.
What you should know
Up to 200,000 characters. Just JWT with three Base64URL segments and UTF-8 JSON. It DOES NOT verify authenticity, signature, expiration or permissions; a decoded payload is not reliable.
Does decoding prove that the JWT is valid?
No. Your data is displayed without verifying signature, issuer or validity. Do not use the result to authorize access.