Navigator: deviceMemory property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

See full compatibility

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

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 the actual memory 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-memory or high-memory devices. These bounds may change over time (see browser compatibility table).

Value

A floating point number coarsened to a power of two value, clamped to implement-defined limits.

For example, if a browser does not report below 2 or above 32 then the value is one of: 2, 4, 8, 16, 32.

Examples

const memory = navigator.deviceMemory;
console.log(`This device approximately ${memory}GiB of RAM.`);

Specifications

Specification
Device Memory API # sec-device-memory-js-api

Browser compatibility

	desktop					mobile							server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS	Node.js
`deviceMemory`	Chrome – Full support Chrome 63 (Release date: 2017-12-06) footnote footnote From Chrome 147, reported values are 2, 4, 8, 16, and 32. footnote Before Chrome 147, reported values were 0.25, 0.5, 1, 2, 4, and 8.	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote footnote From Edge 147, reported values are 2, 4, 8, 16, and 32. footnote Before Edge 147, reported values were 0.25, 0.5, 1, 2, 4, and 8.	Firefox – No support Firefox footnote No support	Opera – Full support Opera 50 (Release date: 2018-01-04) footnote footnote From Opera 131, reported values are 2, 4, 8, 16, and 32. footnote Before Opera 131, reported values were 0.25, 0.5, 1, 2, 4, and 8.	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 63 (Release date: 2017-12-05) footnote footnote From Chrome 147, reported values are 1, 2, 4, and 8. footnote Before Chrome 147, reported values were 0.25, 0.5, 1, 2, 4, and 8.	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 46 (Release date: 2018-05-14) footnote footnote From Chrome 147, reported values are 1, 2, 4, and 8. footnote Before Chrome 147, reported values were 0.25, 0.5, 1, 2, 4, and 8.	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 8 (Release date: 2018-07-18) footnote footnote From Chrome 147, reported values are 1, 2, 4, and 8. footnote Before Chrome 147, reported values were 0.25, 0.5, 1, 2, 4, and 8.	WebView Android – Full support WebView Android 63 (Release date: 2017-12-05) footnote footnote From Chrome 147, reported values are 1, 2, 4, and 8. footnote Before Chrome 147, reported values were 0.25, 0.5, 1, 2, 4, and 8.	WebView on iOS – No support WebView on iOS footnote No support	Node.js – No support Node.js footnote No support

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Full support: Full support
No support: No support
: See implementation notes.

Navigator: deviceMemory property

Value

Examples

Specifications

Browser compatibility

Legend

See also