What are accessibility overlays?
You've probably seen websites with an accessibility widget floating at the bottom of the page: an accessibility overlay. Accessibility overlays are third-party tools that claim to make your website accessible through this widget. They’re often a single line of code that you would add to your website that creates a widget for users to interact with on the website. In that widget, they’ll have the ability to set preferences such as text size, contrast, spacing, or access a built-in screen reader.
On the surface, overlays seem like a quick solution to make your content accessible to all users, but, in reality, they cause more harm. For one, overlays don’t fix any of the coding issues that create the inaccessible content in the first place. They also interfere with the accessibility tools that users already have in place, creating accessibility barriers they claim to fix. Overlays are designed to get websites to pass automated testing only, which only covers about 20-30% of accessibility issues. Overlays also don’t protect your organization from liability, but rather broadcast that your websites aren’t developed properly. The addition of third party code to a website also comes with security and privacy risks.