What Version of Windows Do I Have
See which version of Windows your browser reports, read from your user agent.
Read from your browser's user agent string. Windows 10 and 11 both report the same underlying version (NT 10.0) and can't be told apart this way — check Settings > System > About on the device itself for the exact edition. Newer browsers increasingly send a generic/frozen user agent for privacy, which can make this unreliable. Nothing is sent to a server; this is read and shown entirely in your browser.
What is What Version of Windows Do I Have?
Reads the Windows NT version from your browser's user agent string and translates it to the familiar marketing name (Windows 7, 8, 8.1, 10/11) — a quick check without digging through Settings. The check runs entirely in your browser, with nothing sent to a server — but since the underlying NT version number hasn't changed between Windows 10 and 11, and some browsers now freeze or generalize their user agent for privacy, treat the result as a quick reference rather than a definitive system report.
FAQ
No — both report the same underlying NT 10.0 version in the user agent, so they can't be distinguished this way. Check Settings > System > About on the device for the exact edition.
Either you're not on a Windows device, or your browser sends a generic/frozen user agent for privacy, which is increasingly common.