JWT Tools — Decode, Encode, Verify & Inspect
A complete JWT toolkit for developers. Decode tokens to inspect headers, payloads, and signatures. Encode custom payloads with HMAC signing (HS256/HS384/HS512). Verify token signatures against a secret key. Inspect claims with human-readable timestamps and expiration countdowns. Everything runs in your browser — tokens never leave your device.
Input
Ln 1, Col 1
1 lines155 chars
Header
{
"alg": "HS256",
"typ": "JWT"
}Payload
{
"sub": "1234567890",
"name": "John Doe",
"iat": 1516239022,
"_issuedAt": "2018-01-18T01:30:22.000Z"
}Signature
SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c