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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The mask-clip CSS property determines the area, which is affected by a mask. The painted content of an element must be restricted to this area.

/* <geometry-box> values */
mask-clip: content-box;
mask-clip: padding-box;
mask-clip: border-box;
mask-clip: margin-box;
mask-clip: fill-box;
mask-clip: stroke-box;
mask-clip: view-box;

/* Keyword values */
mask-clip: no-clip;

/* Non-standard keyword values */
-webkit-mask-clip: border;
-webkit-mask-clip: padding;
-webkit-mask-clip: content;
-webkit-mask-clip: text;

/* Multiple values */
mask-clip: padding-box, no-clip;
mask-clip: view-box, fill-box, border-box;

/* Global values */
mask-clip: inherit;
mask-clip: initial;
mask-clip: unset;

Initial valueborder-box
Applies toall elements; In SVG, it applies to container elements excluding the <defs> element and all graphics elements
Computed valueas specified
Animation typediscrete
Canonical orderper grammar


One or more of the keyword values listed below, separated by commas.


The painted content is clipped to the content box.
The painted content is clipped to the padding box.
The painted content is clipped to the border box.
The painted content is clipped to the margin box.
The painted content is clipped to the object bounding box.
The painted content is clipped to the stroke bounding box.
Uses the nearest SVG viewport as reference box. If a viewBox attribute is specified for the element creating the SVG viewport, the reference box is positioned at the origin of the coordinate system established by the viewBox attribute and the dimension of the reference box is set to the width and height values of the viewBox attribute.
The painted content is not clipped.
This keyword behaves the same as border-box.
This keyword behaves the same as padding-box.
This keyword behaves the same as content-box.
This keyword clips the mask image to the text of the element.

Formal syntax

[ <geometry-box> | no-clip ]#

<geometry-box> = <shape-box> | fill-box | stroke-box | view-box

<shape-box> = <box> | margin-box

<box> = border-box | padding-box | content-box


CSS Content

#masked {
  width: 100px;
  height: 100px;
  background-color: #8cffa0;
  margin: 20px;
  border: 20px solid #8ca0ff;
  padding: 20px;
  mask-image: url(https://mdn.mozillademos.org/files/12668/MDN.svg);
  mask-size: 100% 100%;
  mask-clip: border-box; /* Can be changed in the live sample */


Specification Status Comment
CSS Masking Module Level 1
The definition of 'mask-clip' in that specification.
Candidate Recommendation Initial definition

Browser compatibility


FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes -webkit- ?53 No Yes -webkit- Yes -webkit-
border1 ? ? No Yes4
content1 ? ? No Yes4
padding1 ? ? No Yes4
text1 ? ? No Yes4
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support ? ? ?53 No ? ?
border2.1 ? ? ? No ?3.2
content2.1 ? ? ? No ?3.2
padding2.1 ? ? ? No ?3.2
text2.1 ? ? ? No ?3.2


Document Tags and Contributors

 Contributors to this page: fscholz, mfluehr, wbamberg, chrisdavidmills, teoli, Sebastianz, Siilwyn, rolfedh
 Last updated by: fscholz,