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---
title: max-width
slug: Web/CSS/max-width
tags:
- Referencia_CSS
translation_of: Web/CSS/max-width
---
<div>{{CSSRef}}</div>
<p>The <strong><code>max-width</code></strong> <a href="/en-US/docs/CSS">CSS</a> property sets the maximum width of an element. It prevents the <a href="/en-US/docs/Web/CSS/used_value">used value</a> of the {{ Cssxref("width") }} property from becoming larger than the value specified by <code>max-width</code>.</p>
<pre class="brush:css no-line-numbers">/* <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;
max-width: fill-available;
/* Global values */
max-width: inherit;
max-width: initial;
max-width: unset;
</pre>
<p>{{ Cssxref("max-width") }} overrides {{cssxref("width")}}, but {{ Cssxref("min-width") }} overrides {{ Cssxref("max-width") }}.</p>
<p>{{cssinfo}}</p>
<h2 id="Syntax">Syntax</h2>
<h3 id="Values">Values</h3>
<dl>
<dt>{{cssxref("<length>")}}</dt>
<dd>The maximum width, expressed as a {{cssxref("<length>")}}.</dd>
<dt>{{cssxref("<percentage>")}}</dt>
<dd>The maximum width, expressed as a {{cssxref("<percentage>")}} of the containing block's width.</dd>
</dl>
<h4 id="Keyword_values">Keyword values</h4>
<dl>
<dt><code>none</code></dt>
<dd>The width has no maximum value.</dd>
<dt><code>max-content</code>{{experimental_inline()}}</dt>
<dd>The intrinsic preferred width.</dd>
<dt><code>min-content</code>{{experimental_inline()}}</dt>
<dd>The intrinsic minimum width.</dd>
<dt><code>fill-available</code>{{experimental_inline()}}</dt>
<dd>The containing block's width minus the horizontal margin, border, and padding. (Note that some browsers implement an ancient name for this keyword, <code>available</code>.)</dd>
<dt><code>fit-content</code>{{experimental_inline()}}</dt>
<dd>The same as <code>max-content.</code></dd>
</dl>
<h3 id="Formal_syntax">Formal syntax</h3>
{{csssyntax}}
<h2 id="Examples">Examples</h2>
<p>In this example, the "child" will be either 150 pixels wide or the width of the "parent," whichever is smaller:</p>
<div id="basic-max-width-demo">
<pre class="brush: html"><div id="parent">
<div id="child">
Fusce pulvinar vestibulum eros, sed luctus ex lobortis quis.
</div>
</div>
</pre>
<pre class="brush: css">#parent {
background: lightblue;
width: 300px;
}
#child {
background: gold;
width: 100%;
max-width: 150px;
}
</pre>
</div>
<p>{{EmbedLiveSample("basic-max-width-demo", 350, 100)}}</p>
<p>The <code>fit-content</code> value can be used to set the width of an element based on the intrinsic size required by its content:</p>
<div id="fit-content-demo">
<pre class="brush: html" style="display: none;"><div id="parent">
<div id="child">
Child Text
</div>
</div>
</pre>
<pre class="brush: css">#parent {
background: lightblue;
width: 300px;
}
#child {
background: gold;
width: 100%;
max-width: -moz-fit-content;
max-width: -webkit-fit-content;
}
</pre>
</div>
<p>{{EmbedLiveSample("fit-content-demo", 400, 100)}}</p>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{ SpecName('CSS3 Sizing', '#width-height-keywords', 'max-width') }}</td>
<td>{{ Spec2('CSS3 Sizing') }}</td>
<td>Adds the <code>max-content</code>, <code>min-content</code>, <code>fit-content</code>, and <code>fill-available</code> keywords.<em> </em>(Both CSS3 Box and CSS3 Writing Modes drafts used to define these keywords, but are superseded by this spec.<em>)</em></td>
</tr>
<tr>
<td>{{ SpecName('CSS3 Transitions', '#animatable-css', 'max-width') }}</td>
<td>{{ Spec2('CSS3 Transitions') }}</td>
<td>Defines <code>max-width</code> as animatable.</td>
</tr>
<tr>
<td>{{ SpecName('CSS2.1', 'visudet.html#min-max-widths', 'max-width') }}</td>
<td>{{ Spec2('CSS2.1') }}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="Browser_Compatibility" name="Browser_Compatibility">Browser compatibility</h2>
<p>{{Compat("css.properties.max-width")}}</p>
<h2 id="See_also">See also</h2>
<ul>
<li>{{ Cssxref("width") }}, {{ Cssxref("min-width") }}, {{ Cssxref("max-height") }}</li>
<li><a href="/en/CSS/box_model" title="en/CSS/box_model">The box model</a>, {{ Cssxref("box-sizing") }}</li>
</ul>
|
