Decode and Inspect JWT Tokens
Paste a JWT and see its header, payload, and signature decoded and formatted. Check expiration times, claims, and algorithm details at a glance.
Indispensable for debugging authentication issues. When a login fails or an API returns 401, paste the token here to see exactly what's inside without writing any code.
Frequently Asked Questions — JWT Decoder
It decodes and displays the header, payload, and signature. Signature verification requires the secret or public key, which isn't done here.
Yes. Everything runs in your browser. The token is never sent to any server. But avoid sharing JWTs publicly regardless.
Yes. The 'exp' claim is decoded into a human-readable date so you can see when the token expires.
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