Revision 1016423 of <input type="checkbox">

<p><span class="seoSummary">The HTML input element <strong><code>&lt;input type="checkbox"&gt;</code></strong> is an input element to enter an array of different values. The <strong>value</strong> attribute is used to define the value submitted by the checkbox. The <strong>checked</strong> attribute is used to indicate whether this item is selected. The <strong>indeterminate</strong> attribute is used to indicate that the checkbox is in an indeterminate state (on most platforms, this draws a horizontal line across the checkbox).</span></p>

<h2 id="Attributes">Attributes</h2>

<p>This element includes the <a href="https://developer.mozilla.org/en-US/docs/HTML/Global_attributes">global attributes</a>.</p>

<dl>
 <dt>{{htmlattrdef("checked")}}</dt>
 <dd>
 <p>When the value of the <strong>type</strong> attribute is <code>checkbox</code>, the presence of this Boolean attribute indicates that the control is selected by default; otherwise it is ignored.</p>
 </dd>

 <dt>{{htmlattrdef("value")}}</dt>
 <dd>The initial value of the control. This attribute is optional except when the value of the <strong>type</strong> attribute is <code>checkbox</code>.<br />
 Note that when reloading the page, Gecko and IE <a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=46845#c186">will ignore the value specified in the HTML source</a>, if the value was changed before the reload.</dd>
</dl>

<h2 id="Example">Example</h2>

<pre class="brush: html">
&lt;label&gt;&lt;input type="checkbox" id="cbox1" value="first_checkbox"&gt; This is the first checkbox&lt;/label&gt;&lt;br&gt;

&lt;input type="checkbox" id="cbox2" value="second_checkbox"&gt; &lt;label for="cbox2"&gt;This is the second checkbox&lt;/label&gt;
</pre>

<p>This creates two checkboxes, which look like this:</p>

<p>{{EmbedLiveSample("Example")}}</p>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <td>Specification</td>
   <td>Status</td>
  </tr>
  <tr>
  </tr>
  <tr>
   <td>{{SpecName('HTML WHATWG', 'forms.html#checkbox-state-(type=checkbox)', '&lt;checkbox&gt;')}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td>&nbsp;</td>
  </tr>
  <tr>
   <td>{{SpecName('HTML5 W3C', 'forms.html#checkbox-state-(type=checkbox)', '&lt;checkbox&gt;')}}</td>
   <td>{{Spec2('HTML5 W3C')}}</td>
   <td>&nbsp;</td>
  </tr>
  <tr>
   <td>{{SpecName('HTML4.01', 'interact/forms.html#checkbox', '&lt;checkbox&gt;')}}</td>
   <td>{{Spec2('HTML4.01')}}</td>
   <td>&nbsp;</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>1.0</td>
   <td>{{CompatGeckoDesktop("1.7 or earlier")}}</td>
   <td>2 or earlier</td>
   <td>1.0</td>
   <td>1.0</td>
  </tr>
  <tr>
   <td>type=checkbox</td>
   <td>1.0</td>
   <td>{{CompatGeckoDesktop("1.7 or earlier")}}<br />
    {{CompatGeckoDesktop("1.9.2")}} for <code>indeterminate</code> value</td>
   <td>2</td>
   <td>1.0</td>
   <td>1.0</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoMobile("2.0")}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td>type=checkbox</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>