HTML rel="external"

A rel="external" attribute value informs search engines that the link is on a domain that is outside the current website.

Example

#

Two <a> elements with an rel="external" attribute.
The links reference pages from an external server (domain).

The development of Impressionism in the visual arts was soon followed by analogous styles in other media that became known as impressionist music and impressionist iterature.

<p>
  The development of Impressionism in the visual arts was soon 
  followed by analogous styles in other media that became known as 
  <a rel="external" target="_blank" 
     href="https://en.wikipedia.org/wiki/Impressionism_in_music">impressionist music</a> and 
  <a rel="external" target="_blank" 
     href="https://en.wikipedia.org/wiki/Impressionism_(literature)">impressionist iterature</a>.
</p>

Using rel="external"

The rel attribute defines the relationship between the current page and the linked page or resource.

rel="external" instructs search engines that the link is outside the current website.

It also allows CSS attribute selectors to style external links so they look different from local links.


Syntax

<tagname rel="external" />

Elements that accept rel="external"

These elements accept the external value on the rel attribute.

Elements Description
<a> Specifies an anchor link -- see example above
<area> Creates clickable areas inside an image map.
<form> Specifies an HTML form.

Browser support

Here is when rel support started for each browser:

Chrome
6.0 Sep 2010
Firefox
4.0 Mar 2011
IE/Edge
12.0 Jul 2015
Opera
11.1 Mar 2011
Safari
5.0 Jun 2010

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