The window.devicePixelRatio read-only property returns the ratio of the size of one CSS pixel to the vertical size of one physical pixel on the current display device.

Learning resources on MDN

• Window: devicePixelRatio property

Browser support (view on caniuse.com)

• Chrome 1 Released on 2008-12-11
• Chrome Android 18 Released on 2012-06-27
• Edge 12 Released on 2015-07-29
• Firefox 18 Released on 2013-01-08
• Firefox for Android 18 Released on 2013-01-08
• Safari ❌
• Safari on iOS ❌

Baseline availability blocked since July 2015 by Safari (115 months)

View web-platform-tests results for this feature - View the feature source file - Edit the feature - Report an issue about this feature