Presently, there is no standard for having an icon appear on an external link on your website for web accessibility purposes. What we mean by external link, a link that opens a new window or new tab.
No doubt, those using screen readers will be more interested in “what” the link’s alt property contains rather than “how” an icon specifying an external link looks.
For those interested in adding a quick and simple external link icon to all their external links, here is a CSS property for your consideration. This CSS property rule will apply to all links with a target equal to “_blank“.