JWT decoder / encoder

Decode a JSON Web Token, check its signature and expiry, or sign a new one.

Runs in your browser

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About JWT decoder / encoder

JWT decoder and encoder shows the header and payload of a JSON Web Token as readable JSON, tells you when it was issued and when it expires, and verifies an HMAC signature with your secret. Switch to encode to sign a new token. Tokens and secrets never leave your browser.

Header and payload as formatted JSON
Expiry and issued-at shown as dates
Verify and sign with HS256, HS384 and HS512

How to use JWT decoder / encoder

1Paste a token to decode it, or switch to Encode.
2Add the secret to verify or sign (HS256, HS384, HS512).
3Copy the header, payload or new token.