Decode JSON Web Tokens (JWT) and inspect header and payload instantly. No secrets, no verification.
A JWT consists of three Base64URL‑encoded parts: header, payload, and signature. This tool decodes the header and payload so you can inspect the claims. It does not verify signatures or check token validity.
Decoded payload might look like:
{
"sub": "1234567890",
"name": "Lucas",
"admin": true,
"iat": 1516239022
}