Dev Tools

JWT decoder / generator

Decode JWT segments and inspect expiry; or re-sign with a secret. All computation runs locally in your browser.

Header
{
  "alg": "HS256",
  "typ": "JWT"
}
Payload
{
  "sub": "1234567890",
  "name": "John Doe",
  "iat": 1516239022
}
No exp claim