$ whoami --browser
What your browser tells every website: user agent, operating system, screen and capabilities, plus whether your browser is the latest release. Detection runs in your browser; nothing is stored.
detecting...
;; http request headers the server received
- user-agent
- Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
- accept
- */*
- accept-language
- accept-encoding
- gzip, br
- sec-ch-ua
- (not sent: Firefox and Safari do not support client hints)
- sec-ch-ua-platform
- (not sent)
- sec-ch-ua-mobile
- (not sent)
- dnt / sec-gpc
- - / -
- sec-fetch-site/mode
- - / -
- protocol
- HTTP/1.1
Latest-version data comes from Google, Microsoft and Mozilla and is cached for 6 hours. Safari and other browsers have no public version feed, so they are identified but not version-checked. Chrome freezes parts of its user agent string, so the OS version here comes from client hints when available.