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.

Syntax

css
/* 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: revert;
zoom: revert-layer;
zoom: unset;

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. Do not use this value, use the standard unset value instead.

<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

zoom =
  normal | reset | <number> | <percentage>

Examples

First example

HTML

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

CSS

css
.small {
  zoom: 75%;
}
.normal {
  zoom: normal;
}
.big {
  zoom: 2.5;
}
p:hover {
  zoom: unset;
}

Result

Second example

HTML

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

CSS

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. Apple has a description in the Safari CSS Reference. Rossen Atanassov of Microsoft has an unofficial draft specification proposal on GitHub.

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
zoom
Non-standard
The reset value
Non-standard

See also