JWT Decoder (Decode JSON Web Tokens Online)
Decode JWT tokens instantly. View header and payload data from JSON Web Tokens without verifying the signature.
Free online tool. No signup required. All processing runs in your browser.
About this tool
This JWT decoder allows you to quickly decode and inspect the header and payload of a token. It helps developers debug authentication flows, inspect claims, and understand token structure without needing backend tools.
What is JWT Decoder (Decode JSON Web Tokens Online)?
A JSON Web Token (JWT) is a compact and secure way to transmit information between parties as a JSON object. It is commonly used for authentication and authorization in modern web applications.
How to use JWT Decoder (Decode JSON Web Tokens Online)
- Paste your JWT token into the input field.
- The tool will automatically decode the header and payload.
- Review claims such as user ID, expiration time (exp), and roles.
FAQ
Does this tool verify JWT signatures?
No. This tool only decodes the token and does not verify its signature.
Can I decode expired tokens?
Yes. Expired tokens can still be decoded; check the exp field for expiry.
Is it safe to paste my JWT?
Yes. The decoding happens locally in your browser.