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;

Initial valuenormal
Applies toall elements
Inheritedno
Mediavisual
Computed valueas specified
Animation typean integer
Canonical orderthe unique non-ambiguous order defined by the formal grammar

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 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

This property is nonstandard and 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

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) No support [1] 5.5 (Yes) 4.0
The reset value ? No support ? No support ? (Yes)
Feature Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? (Yes) ? [1] ? ? ?
The reset value ? No support ? No support ? ?

[1]: bug 390936 – Implement Internet Explorer zoom property for css

See also