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/CSS

scaleY()

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.

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

Try it

transform: scaleY(1);

transform: scaleY(0.7);

transform: scaleY(1.3);

transform: scaleY(-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 ordinate (vertical, y-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 not conserved. scaleY(-1) defines an axial symmetry, with a horizontal axis passing through the origin (as specified by the transform-origin property).

Note: scaleY(sy) is equivalent to scale(1, sy) or scale3d(1, sy, 1).

transform: rotateX(180deg); === transform: scaleY(-1);

Syntax

scaleY(s)

Values

s: Is a <number> representing the scaling factor to apply on the ordinate (vertical, y-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
$\left( \begin{array}{cc} 1 & 0 \\ 0 & s \end{array} \right)$	$\left( \begin{array}{ccc} 1 & 0 & 0 \\ 0 & s & 0 \\ 0 & 0 & 1 \end{array} \right)$	$\left( \begin{array}{ccc} 1 & 0 & 0 \\ 0 & s & 0 \\ 0 & 0 & 1 \end{array} \right)$	$\left( \begin{array}{cccc} 1 & 0 & 0 & 0 \\ 0 & s & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array} \right)$
	`[1 0 0 s 0 0]`

Formal syntax

<scaleY()> = 
  scaleY( [ <number> | <percentage> ] )

Examples

HTML

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

CSS

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

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

Result

Specifications

Specification
CSS Transforms Module Level 1> # funcdef-transform-scaley>

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
`scaleY`	1	12	3.5	10.5	3.1	18	4	11	3.2	1.0	2	3.2