Navigator: oscpu property

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The Navigator.oscpu property returns a string that identifies the current operating system.


A string providing a string which identifies the operating system on which the browser is running.

Operating system oscpuInfo string format
OS/2 OS/2 Warp x (either 3, 4 or 4.5)
Windows CE WindowsCE x.y
Windows 64-bit (64-bit build) Windows NT x.y; Win64; x64
Windows 64-bit (32-bit build) Windows NT x.y; WOW64
Windows 32-bit Windows NT x.y
Mac OS X (PPC build) PowerPC Mac OS X version x.y
Mac OS X (i386/x64 build) Intel Mac OS X or macOS version x.y
Linux 64-bit (32-bit build) Output of uname -s followed by i686 on x86_64
Linux Output of uname -sm

In this table x.y refers to the version of the operating system


function osInfo() {

osInfo(); // alerts "Windows NT 6.0" for example

Usage notes

Unless your code is privileged (chrome or at least has the UniversalBrowserRead privilege), it may get the value of the general.oscpu.override preference instead of the true platform.


HTML Standard
# dom-navigator-oscpu

Browser compatibility

BCD tables only load in the browser