zoom

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The non-standard zoom CSS property can be used to control the magnification level of an element. transform: scale() should be used instead of this property, if possible. However, unlike CSS Transforms, zoom affects the layout size of the element.

/* Keyword values */
zoom: normal;
zoom: reset;

/* <percentage> values */
zoom: 50%;
zoom: 200%;

/* <number> values */
zoom: 1.1;
zoom: 0.7;

/* Global values */
zoom: inherit;
zoom: initial;
zoom: unset;

Syntax

Values

normal
Render this element at its normal size.
reset
Do not (de)magnify this element if the user applies non-pinch-based zooming (e.g. by pressing Ctrl-- or Ctrl++ keyboard shortcuts) to the document. Only supported by WebKit (and possibly Blink).
<percentage>
Zoom factor. 100% is equivalent to normal. Values larger than 100% zoom in. Values smaller than 100% zoom out.
<number>
Zoom factor. Equivalent to the corresponding percentage (1.0 = 100% = normal). Values larger than 1.0 zoom in. Values smaller than 1.0 zoom out.

Formal definition

Initial valuenormal
Applies toall elements
Inheritedno
Computed valueas specified
Animation typean integer

Formal syntax

normal | reset | <number> | <percentage>

Examples

First example

HTML

<p class="small">Small</p>
<p class="normal">Normal</p>
<p class="big">Big</p>

CSS

p.small {
  zoom: 75%;
}
p.normal {
  zoom: normal;
}
p.big {
  zoom: 2.5;
}
p {
  display: inline-block;
}
p:hover {
  zoom: reset;
}

Result

Second example

HTML

<div id="a" class="circle"></div>
<div id="b" class="circle"></div>
<div id="c" class="circle"></div>

CSS

div.circle {
  width: 25px;
  height: 25px;
  border-radius: 100%;
  text-align: center;
  vertical-align: middle;
  display: inline-block;
  zoom: 1.5;
}
div#a {
  background-color: gold;
  zoom: normal;
}
div#b {
  background-color: green;
  zoom: 200%;
}
div#c {
  background-color: blue;
  zoom: 2.9;
}

Result

Specifications

Not part of any standard. This property originated in Internet Explorer. Apple has a description in the Safari CSS Reference. Rossen Atanassov of Microsoft has an unofficial draft specification proposal on GitHub.

Browser compatibility

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
zoom
Non-standard
Chrome Full support 1Edge Full support 12Firefox No support No
Notes
No support No
Notes
Notes See bug 390936.
IE Full support 5.5Opera Full support 15Safari Full support 3.1WebView Android Full support ≤37Chrome Android Full support 18Firefox Android No support No
Notes
No support No
Notes
Notes See bug 390936.
Opera Android Full support 14Safari iOS Full support 3Samsung Internet Android Full support 1.0
The reset value
Non-standard
Chrome No support 1 — 59Edge No support NoFirefox No support NoIE No support NoOpera No support 15 — 46Safari Full support 3.1WebView Android No support ≤37 — 59Chrome Android No support 18 — 59Firefox Android No support NoOpera Android No support 14 — 43Safari iOS Full support 3Samsung Internet Android No support 1.0 — 7.0

Legend

Full support
Full support
No support
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
See implementation notes.
See implementation notes.

See also