Navigator.deviceMemory

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The deviceMemory read-only property of the Navigator interface returns the approximate amount of device memory in gigabytes.

The reported value is imprecise to curtail fingerprinting. It’s approximated by rounding down to the nearest power of 2, then dividing that number by 1024. It is then clamped within lower and upper bounds to protect the privacy of owners of very low- or high-memory devices.

Syntax

memoryAmount = navigator.deviceMemory

Value

A floating point number; one of 0.25, 0.5, 1, 2, 4, 8.

Example

const memory = navigator.deviceMemory
console.log (`This device has at least ${memory}GiB of RAM.`)

Specifications

Specification Status Comment
Device Memory 1
The definition of 'deviceMemory' in that specification.
Editor's Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
deviceMemory
Experimental
Chrome Full support 63Edge Full support 79Firefox No support NoIE No support NoOpera Full support 50Safari No support NoWebView Android Full support 63Chrome Android Full support 63Firefox Android No support NoOpera Android Full support 46Safari iOS No support NoSamsung Internet Android Full support 8.0

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also