- No data uploaded
- Instant results
JWT Decoder
Decode a JWT’s header and payload and read iat/exp/nbf as dates — entirely in your browser, so tokens never leave your machine.
JWT Decoder
Algorithmtype JWT · signature not verified
Header + payload
{
"alg": "HS256",
"typ": "JWT"
}
{
"sub": "1234567890",
"name": "John Doe",
"iat": 1700000000,
"exp": 1900000000
}| Claim | Date |
|---|---|
| iat | 2023-11-14 22:13:20 UTC |
| exp | 2030-03-17 17:46:40 UTC |
Decoding is done locally — the token is never sent anywhere. Decoding is not verification: always validate the signature server-side with the issuer’s key.
Frequently asked questions
Is my data uploaded?
No. The calculation runs entirely in your browser — nothing you type is sent to a server.
Is it free?
Yes — free, unlimited and no sign-up.