JWT Decoder
Paste a JWT to inspect header and payload claims — decoding only, no verification.
Decode JSON Web Tokens.
How to use
- Paste a JWT token into the input field.
- View the decoded header and payload JSON.
- Inspect claims such as exp, sub, and iss.
- Remember this tool does not verify signatures.
About JWT Decoder
Decode JSON Web Tokens.
Runs in your browser — your files and input stay on your device.
Frequently asked questions
Does this verify the JWT signature?
No. This only decodes Base64URL content for inspection.
Is my token sent to a server?
No. Decoding happens in your browser.
Is it safe to paste production tokens?
Avoid pasting secrets in shared environments. Tokens may contain sensitive claims.