Free JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, expiration status, and signature information.
About JWT Tokens
What is a JWT?
JSON Web Tokens are compact, URL-safe tokens used for securely transmitting information between parties.
Three Parts
Header (algorithm), Payload (claims/data), and Signature (verification). Separated by dots.
Security Note
JWTs are encoded, not encrypted. Never store sensitive data in the payload without additional encryption.
About This Tool
This free online tool is part of BugBrain's developer toolkit. It runs entirely in your browser—no data is sent to any server, ensuring your information stays private and secure. Use it as many times as you need, completely free.