Decode JWT header and payload locally so you can inspect claims and timestamps without sending the token anywhere.
Decoding is not signature verification. This tool reads token contents only.
Yes.
No. The token stays in the page.
No. Decoding only reads the token parts. Signature verification is a separate step.
Yes. Common timestamp claims are shown both as raw values and readable dates when possible.
Decoding lets you inspect claims like issuer, audience, subject, scope, and expiry without touching your backend.
What it does not tell you is whether the token is trusted. Reading a payload and verifying a signature are separate steps.
Even if the page stays local, production tokens still should not end up in screenshots, tickets, or chat threads.
If you need real verification, use a verifier instead of assuming the decoded payload can be trusted.
Learn what a JWT is, how to decode one, what each part means, and real-world debugging tips from production experience.
Troubleshoot JWT problems: expired tokens, invalid signatures, missing claims, and more with battle-tested debugging strategies.
Paste your input at the top and the result shows up right below. The FAQ and related tutorials are there if you want more.