JWT Decoder
Decode and inspect JSON Web Tokens instantly. View the header, payload claims, and signature in a clean, readable format.
{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "1234567890",
"name": "John Doe",
"iat": 1516239022,
"exp": 1735258800,
"role": "admin",
"email": "john@example.com"
}SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5cThe signature is used to verify the token's authenticity. This tool does not perform signature verification.
What this tool does
Decodes JWT tokens into their three parts: header (algorithm info), payload (claims and data), and signature (verification data). Perfect for debugging authentication issues.
How to use it
Paste your JWT token in the input field. The tool automatically decodes it and displays the header and payload as formatted JSON. Use the tabs to toggle between formatted and raw views.
Privacy note
Your tokens never leave your browser. All decoding happens locally on your device. We don't store, log, or transmit any data you enter.
Important notice
This tool only decodes JWTs to inspect their contents. It does not verify signatures or validate token authenticity. Never trust a token solely based on decoded content.