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.
Need the opposite? What Operating System Do I Have
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.
How to Use This Tool
- 1
Open This Page on Windows: Visit this page on the device you want to check.
- 2
Read the Detected Version: The Windows version and bitness, parsed from the user agent string, appear automatically.
How It Works
Windows includes a `Windows NT X.X` token inside `navigator.userAgent` (for example, `Windows NT 10.0`), and this tool looks for that token, maps it to the familiar marketing name, and also reports whether the build string indicates 64-bit. It's parsed entirely in your browser; nothing about your device is sent to a server.
Why This Might Be Wrong or Say "Not Windows"
The user agent is self-reported by the browser, not verified by Windows or this site. Results can be wrong or missing because: you're on a non-Windows device; the underlying NT version number genuinely hasn't changed between Windows 10 and 11 (both report `NT 10.0`), so this method fundamentally can't distinguish the two, regardless of user agent freshness; browsers increasingly send a generalized or frozen user agent for privacy (Chrome's User-Agent Reduction effort is a notable example that specifically flattened Windows version detail); or a browser is deliberately sending a different platform's tokens for site compatibility. For the exact edition, check Settings > System > About on the device itself.
Frequently Asked Questions
Common questions about What Version of Windows Do I Have.