What this tool is for
JWT Decoder reads the header and payload sections of a token so you can inspect claims quickly.
When to use it
Use it when debugging authentication flows, checking expiry values, or documenting token shape.
What the result means
The result is formatted JSON for the header and payload. It does not verify the signature.
Use notes
- A decoded JWT is not automatically trusted.
- Anyone with a token can decode the non-encrypted claims.
- Never paste live access tokens from production systems unless your policy allows it.
Privacy and limits
Everything runs in your browser tab. Avoid pasting production secrets, private tokens, customer data, or proprietary code into any online page unless your team policy allows it.