Free JWT Decoder - Decode & Verify JSON Web Tokens Online
Decode JSON Web Tokens (JWT) instantly. View header, payload, and signature securely in your browser.
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Invalid token format
Algorithm —
Status —
Issued At —
Expires —
Signature
Signature verification requires a secret key.
Header Algorithm & Token Type
Payload Data Claims
Debug Your Tokens
Paste your JWT and instantly decode its contents. Our tool visualizes the Header, Payload, and Signature structure, helping you debug authentication issues and verify token claims (like expiration).
Key Features
Secure Decoding
Everything happens in your browser. Tokens are never sent to a server.
Expiration Check
Instantly see if the token is active or expired.
Pretty Print
Auto-formats the JSON for easy reading.