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max-width

The max-width CSS property sets the maximum width of an element. It prevents the used value of the width property from becoming larger than the value specified by max-width.

max-width overrides width, but min-width overrides max-width.

Syntax

/* <length> value */
max-width: 3.5em;

/* <percentage> value */
max-width: 75%;

/* Keyword values */
max-width: none;
max-width: max-content;
max-width: min-content;
max-width: fit-content(20em);

/* Global values */
max-width: inherit;
max-width: initial;
max-width: unset;

Values

<length>
Defines the max-width as an absolute value.
<percentage>
Defines the max-width as a percentage of the containing block's width.
none
No limit on the size of the box.
max-content
The intrinsic preferred max-width.
min-content
The intrinsic minimum max-width.
fit-content(<length-percentage>)
Uses the fit-content formula with the available space replaced by the specified argument, i.e. min(max-content, max(min-content, argument)).

Accessibility concerns

Ensure that elements set with a max-width are not truncated and/or do not obscure other content when the page is zoomed to increase text size.

Formal definition

Initial value none
Applies to all elements but non-replaced inline elements, table rows, and row groups
Inherited no
Percentages refer to the width of the containing block
Computed value the percentage as specified or the absolute length or none
Animation type a length, percentage or calc();

Formal syntax

auto | <length> | <percentage> | min-content | max-content | fit-content(<length-percentage>)

where
<length-percentage> = <length> | <percentage>

Examples

Setting max width in pixels

In this example, the "child" will be either 150 pixels wide or the width of the "parent," whichever is smaller.

HTML

<div id="parent">
  <div id="child">
    Fusce pulvinar vestibulum eros, sed luctus ex lobortis quis.
  </div>
</div>

CSS

#parent {
  background: lightblue;
  width: 300px;
}

#child {
  background: gold;
  width: 100%;
  max-width: 150px;
}

Result

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
max-width 1 12 1
1
CSS 2.1 leaves the behavior of max-width with table undefined. Firefox supports applying max-width to table elements.
7 4
4
CSS 2.1 leaves the behavior of max-width with table undefined. Opera supports applying max-width to table elements.
1
fit-content 46
46
25
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
79
79
79
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
3
Prefixed
3
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.
No 44 11
11
6.1
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
2
Uses the non-standard name: intrinsic
max-content 46
46
22
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
79
79
79
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
66
66
3
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
No 44 11
11
6.1
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
2
Uses the non-standard name: intrinsic
min-content 46
46
25
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
79
79
79
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
66
66
3
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
No 44 11
11
6.1
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
2
Uses the non-standard name: intrinsic
stretch 22
22
Uses the non-standard name: -webkit-fill-available
79
79
Uses the non-standard name: -webkit-fill-available
No No 15
15
Uses the non-standard name: -webkit-fill-available
No
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
max-width 4.4 18 4
4
CSS 2.1 leaves the behavior of max-width with table undefined. Firefox supports applying max-width to table elements.
14 1 1.0
fit-content 46
46
≤37
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
46 4
Prefixed
4
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.
43 11
11
7
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
1
Uses the non-standard name: intrinsic
5.0
max-content 46
46
≤37
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
46 66
66
4
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
43 11
11
7
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
1
Uses the non-standard name: intrinsic
5.0
min-content 46 46 66
66
4
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
43 11
11
7
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
1
Uses the non-standard name: intrinsic
5.0
stretch 4.4
4.4
Uses the non-standard name: -webkit-fill-available
25
25
Uses the non-standard name: -webkit-fill-available
No 14
14
Uses the non-standard name: -webkit-fill-available
No 1.5
1.5
Uses the non-standard name: -webkit-fill-available

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/max-width