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.

ThescaleY()CSS function defines a transformation that resizes an element along they-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>  <img          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 casethe function is the identity transform. The scaling is not isotropic, and the angles of the element are not conserved.scaleY(-1) defines anaxial symmetry, with a horizontal axis passing through the origin (as specified by thetransform-originproperty).

Note:scaleY(sy) is equivalent toscale(1, sy) orscale3d(1, sy, 1).

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

Syntax

css

scaleY(s)

Values

s: Is a<number> representing the scaling factor to apply on the ordinate (vertical, y-coordinate) of each point of theelement.

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

Formal syntax

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

Examples

HTML

html

<div>Normal</div><div>Scaled</div>

CSS

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

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This page was last modified on⁨Jul 14, 2025⁩ byMDN contributors.

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