JWT Decoder
EncodingDecode a JWT's header and payload locally — nothing is sent to a server. Shows claims and expiry.
Frequently asked
Is JWT Decoder free to use?
Yes. JWT Decoder is completely free, with no sign-up and no usage limits.
Does JWT Decoder upload my data?
No. JWT Decoder runs entirely in your browser — your input never leaves your device and nothing is stored on a server.
How does JWT Decoder work?
Decode a JWT's header and payload locally — nothing is sent to a server. Shows claims and expiry.
Can I use JWT Decoder offline?
Once the page has loaded it works without a network connection, because all processing happens locally in your browser.