JWT Token Decoder
Quickly inspect authentication tokens, user claims, roles, and expiration times.
Security Notice: This tool decodes and inspects JWT structure entirely in your browser. It does not verify cryptographic signatures or authenticate private keys. Your tokens are never sent to any server.
{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "1234567890",
"name": "Alice Dev",
"iat": 1516239022
}How it works
Paste Token
Paste an encoded JWT string (header.payload.signature).
Inspect Claims
Review the formatted header and payload JSON.
Check Expiry
Verify whether the token is currently active or expired.
Frequently Asked Questions
No. Decoding only reads the encoded JSON header and payload claims. Cryptographic verification requires the secret key.
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