Overlays & widgets
Do accessibility overlays make you ADA compliant?
Short answer: no. A one-line script cannot rewrite your markup, fix your focus order, or write real alt text. Here's what an overlay actually installs, and what still has to be fixed at the source.
What's actually running on your site
What an overlay widget actually does
Products like accessiBe, UserWay, and AudioEye add a JavaScript snippet that applies CSS overrides (contrast, font size, cursor size), adds a floating toolbar, and in some cases runs computer-vision captioning over your images. Some of that is a genuine convenience layer for visitors who use it. None of it touches your actual markup, so the barriers underneath are still there for anyone using a screen reader, switch device, or keyboard alone — they're just hidden from a casual look at the page.
An overlay runs entirely in the browser, after your page has already loaded. It can restyle what's on screen, but it has no way to know which custom dropdown is missing keyboard support, which button has no accessible name, or which video has no captions track — those are structural gaps in the code, and structural gaps need a structural fix. WCAG conformance is evaluated against the actual experience delivered to assistive technology, not against whether a script is present on the page.
That's also why every credible overlay vendor's own terms of service disclaim a compliance guarantee, even while the marketing implies one. Treat an overlay the way you'd treat a floor wax on a cracked foundation: it can make the surface look better, and it will not stop the crack from spreading.
Six claims we hear from overlay vendors.
Each one sounds reasonable until you check it against how WCAG conformance and ADA litigation actually work.
- Myth: installing an overlay satisfies WCAG 2.2 AA. Reality: conformance is measured against the rendered experience for assistive technology, not against whether a vendor's script tag is present.
- Myth: an overlay makes a site immune to ADA lawsuits. Reality: several overlay vendors have themselves been named as co-defendants in accessibility lawsuits, alongside the very sites that installed them.
- Myth: an automated widget can write real alt text. Reality: a "photo of a person" caption on a submit button tells a screen-reader user nothing about what happens when they activate it.
- Myth: overlays are a permanent, install-once fix. Reality: every new page, component, and release can reopen the same barriers — there's no substitute for testing again after each change.
- Myth: auditors and regulators accept an overlay badge as evidence. Reality: a documented audit trail — evidence, fixes, and retests — is what a VPAT/ACR or regulator actually wants to see.
- Myth: overlays are cheaper than fixing the source. Reality: a subscription that never resolves the underlying defects is a recurring cost against a risk that never goes away — source fixes are a one-time cost against a risk that does.