JWT Header Debugger
Instantly decode and inspect JWT headers and payloads. No data is sent to the server.
HEADER: ALGORITHM & TOKEN TYPE
PAYLOAD: DATA
Status: Waiting for input...
🔒 Security Note
JWTs are not encrypted by default. This tool only decodes the Base64Url strings in the token. Anyone with the token can see the data inside. Never put sensitive passwords or secrets inside a JWT payload unless it is also encrypted (JWE).