JWT Decoder
Decode and inspect JSON Web Tokens entirely client-side.
Decoded entirely in your browser — the signature is displayed but not verified.
FAQ
Does this verify the signature?
No. This tool only decodes the Base64URL-encoded header and payload for inspection. Verifying the signature requires the secret key and must be done server-side.
Is my token sent anywhere?
No. Decoding happens entirely in your browser — the token never leaves your device.