Decode and inspect JSON Web Tokens without any server.
JWT Decoder in 3 simple steps
Enter your JSON Web Token.
Header, payload, and signature are decoded and displayed.
View all claims with timestamps converted to readable dates.
Header and payload decoded and formatted immediately.
exp, iat, nbf timestamps shown as readable dates.
Token never leaves your browser.
Pretty-printed JSON with syntax highlighting.
JSON Web Tokens are everywhere in modern authentication. Our decoder lets you paste any JWT and instantly see the decoded header, payload, and signature — all without sending the token to any server.
Timestamps like exp, iat, and nbf are automatically converted to human-readable dates for easy inspection.