`scaleX()` CSS function

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

See full compatibility

The scaleX() CSS function defines a transformation that resizes an element along the x-axis (horizontally). Its result is a <transform-function> data type.

Try it

transform: scaleX(1);

transform: scaleX(0.7);

transform: scaleX(1.3);

transform: scaleX(-0.5);

<section id="default-example">
  <img class="transition-all" id="example-element" src="../../../../../../../shared-assets/images/examples/firefox-logo.svg" width="200">
</section>

It modifies the abscissa (horizontal, x-coordinate) of each element point by a constant factor, except when the scale factor is 1, in which case the function is the identity transform. The scaling is not isotropic, and the angles of the element are generally not conserved, except for multiples of 90 degrees. scaleX(-1) defines an axial symmetry, with a vertical axis passing through the origin (as specified by the transform-origin property).

Note: scaleX(sx) is equivalent to scale(sx, 1) or scale3d(sx, 1, 1).

Syntax

css

scaleX(s)

Values

s: Is a <number> representing the scaling factor to apply on the abscissa (horizontal, x-coordinate) of each point of the element.

Cartesian coordinates on ℝ^2	Homogeneous coordinates on ℝℙ^2	Cartesian coordinates on ℝ^3	Homogeneous coordinates on ℝℙ^3
$\left( \begin{array}{cc} s & 0 \\ 0 & 1 \end{array} \right)$	$\left( \begin{array}{ccc} s & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array} \right)$	$\left( \begin{array}{ccc} s & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array} \right)$	$\left( \begin{array}{cccc} s & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array} \right)$
	`[s 0 0 1 0 0]`

Formal syntax

<scaleX()> = 
  scaleX( <number> )

Examples

HTML

html

<div>Normal</div>
<div class="scaled">Scaled</div>

CSS

css

div {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}

.scaled {
  transform: scaleX(0.6);
  background-color: pink;
}

Result

Specifications

Specification
CSS Transforms Module Level 1 # funcdef-transform-scalex

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`scaleX()`	Chrome – Full support Chrome 1 (Release date: 2008-12-11) footnote Full support	Edge – Full support Edge 12 (Release date: 2015-07-29) footnote Full support	Firefox – Full support Firefox 3.5 (Release date: 2009-06-30) footnote Full support	Opera – Full support Opera 10.5 (Release date: 2010-03-02) footnote Full support	Safari – Full support Safari 3.1 (Release date: 2008-03-18) footnote Full support	Chrome Android – Full support Chrome Android 18 (Release date: 2012-06-27) footnote Full support	Firefox for Android – Full support Firefox for Android 4 (Release date: 2011-03-29) footnote Full support	Opera Android – Full support Opera Android 11 (Release date: 2011-03-22) footnote Full support	Safari on iOS – Full support Safari on iOS 3.2 (Release date: 2010-04-03) footnote Full support	Samsung Internet – Full support Samsung Internet 1 (Release date: 2013-04-27) footnote Full support	WebView Android – Full support WebView Android 2 (Release date: 2009-10-26) footnote Full support	WebView on iOS – Full support WebView on iOS 3.2 (Release date: 2010-04-03) footnote Full support

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Full support: Full support

scaleX() CSS function

Legend

`scaleX()` CSS function