JWT Decoder
Decode and inspect JWT tokens
🔒 Runs 100% in your browser — token is never sent to a server
About JWT Decoder
Decode and inspect JWT tokens online. View header, payload and verify signature. 100% client-side, secure.
Frequently Asked Questions
Is it safe to paste my JWT here?
Yes. The decoder runs entirely in your browser. Your token is never sent to any server.
What does a JWT contain?
A JWT has three parts: header (algorithm), payload (claims/data), and signature. The payload is just Base64-encoded — not encrypted.