How to decode a JWT safely in the browser

Inspect JWT header and payload locally, understand claims, and avoid pasting production tokens into public debuggers.

Auth bugs often hide in token claims. This guide walks through decoding a JWT with Tentaco, reading `exp`/`aud`, and remembering that decode ≠ verify.

Treat live access tokens as secrets even during debugging.

Étapes

Open /use/jwt-decoder in Security Studio / JWT mode.
Paste the token and review header algorithm plus payload claims.
Check expiry and audience against what your API expects.
Clear the editor afterward; verify signatures only in your trusted auth stack.

Try it here

Interactive preview — runs in your browser.

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