JWT Decoder
Paste a JWT to decode its header, payload, and signature.
About the JWT Decoder
Decode and inspect JSON Web Token header, payload, and signature. View claims, expiration, and token structure.
The JWT Decoderruns entirely in your browser — your data is never uploaded to a server, so it stays private and works instantly, even offline. It's completely free, requires no sign-up, and works on desktop and mobile.
Frequently Asked Questions
- How do I decode a JWT token?
- Paste your JWT token and the tool instantly decodes the header, payload, and signature sections. You can inspect all claims including expiration time and issuer.
- Is it safe to decode JWT tokens online?
- Yes — this tool runs entirely in your browser. Your token is never sent to any server. However, JWT tokens are only encoded (not encrypted), so anyone with the token can read the payload.