🔒 Your JWT Never Leaves Your Browser
This tool runs entirely in your browser using JavaScript. No data is sent to any server. Safe for production tokens.
Invalid JWT format
Header
ALGORITHM
Payload
DATA
Signature
VERIFICATION
Token Info
Paste a JWT token above to decode it
Supports HS256, HS384, HS512, RS256, ES256, and more
Current Unix Timestamp
Useful for JWT exp/iat claims