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Why We Don't Recommend Accessibility Overlays

We’re often asked about accessibility overlays. Here’s why we recommend against them — with the evidence, the law, and the expert consensus in one place.

We are frequently asked about accessibility overlays — the toolbar widgets that claim to make any website accessible with a single line of code. Our recommendation is straightforward: don’t use them.

But why not? What are the actual reasons? Rather than simply asking people to take our word for it, we’ve brought together the key evidence, expert guidance, regulatory positions, and enforcement actions from across the accessibility community into one place. This is a collection of the various points and articles published online that explain why overlays fall short — and in many cases make things worse.

If you’re evaluating whether an overlay is the right approach for your organisation, or if someone has recommended one to you, this resource should help you make an informed decision.

Table of Contents

Why We Wrote This

We are frequently asked about accessibility overlays — the toolbar widgets that claim to make any website accessible with a single line of code. Our recommendation is straightforward: don’t use them.

But why not? What are the actual reasons? Rather than simply asking people to take our word for it, we’ve brought together the key evidence, expert guidance, regulatory positions, and enforcement actions from across the accessibility community into one place. This is a collection of the various points and articles published online that explain why overlays fall short — and in many cases make things worse.

If you’re evaluating whether an overlay is the right approach for your organisation, or if someone has recommended one to you, this resource should help you make an informed decision.

Overlays Don't Fix the Core Problems

Overlays typically correct only 20–40% of common accessibility issues, leaving the majority of barriers unaddressed. They consistently miss critical requirements including:

  • Semantic heading structure
  • Proper form labelling
  • Keyboard navigation and focus management
  • ARIA attributes and roles
  • Accessible data tables
  • Meaningful link text

Automated AI-based detection tools — including those embedded in overlays — can only catch approximately 20–30% of WCAG issues. The remaining 70–80% require human testing, manual code review, and assistive technology testing to identify and resolve.

Source: Accessibility Overlays in 2025 — NWS Digital

Source: Avoiding Accessibility Overlays — ZAG Interactive

Overlays Interfere with Assistive Technologies

People with disabilities already use assistive technologies customised to their specific needs — screen readers like JAWS, NVDA, or VoiceOver; browser extensions; and operating system accessibility features. Overlays frequently:

  • Override native browser settings and inject unpredictable code
  • Conflict with screen readers, causing misinterpretation or ignoring of modified content
  • Disrupt keyboard navigation, preventing users from efficiently moving through pages
  • Provide incorrect information to Braille displays
  • Overwrite correctly implemented native HTML elements, undoing otherwise accessible development work

Many blind users have created browser extensions specifically to block accessibility overlays because they interfere so much with their actual screen readers.

67%
of all respondents rated overlay tools as not at all effective or not very effective
72%
of respondents with disabilities rated them not at all effective or not very effective
2.4%
rated overlay tools as very effective

Source: WebAIM — Survey of Web Accessibility Practitioners #3, 2021

Source: Avoid Accessibility Overlay Tools — Accessibility.Works

Source: Do Away with Overlays — Accessible Web

Source: 5 Critical Problems with Accessibility Overlays — A11y Impact

Overlays Don't Address Non-Web Content

This is a critical gap that overlay vendors rarely acknowledge. Overlays do nothing for:

  • Emails — remain inaccessible
  • PDF documents — remain inaccessible
  • PowerPoint presentations — remain inaccessible
  • Word documents — remain inaccessible
  • Video and audio content — remain without captions or transcripts
  • Learning Management System content — course materials remain inaccessible

According to the FTC’s complaint, the terms of service for one major overlay vendor did not adequately disclose that PDFs, PowerPoint files, audio and video files, and other content types would not be made accessible unless additional services were purchased.

Without training, staff continue to produce inaccessible content every day. An overlay on the website changes nothing about the accessibility of the documents, emails, presentations, and learning materials your organisation creates.

Source: FTC Fines accessiBe — Design Domination

Source: Overlay Fact Sheet

Overlays Create a False Sense of Compliance

When an organisation installs an overlay, leadership often believes the accessibility problem is solved. This creates several damaging consequences:

  • Investment in genuine accessibility stops — no audits, no training, no remediation.
  • Staff never develop accessibility skills — the knowledge gap widens
  • New inaccessible content continues to be produced daily.
  • Any website without an overlay is perceived as inferior, even if it is genuinely accessible through proper development.
  • The organisation becomes more legally vulnerable, not less.

Source: The Deceptive Facade of Accessibility Overlays — AccessiTREE

Overlays and Legal Risk

Data from accessibility litigation reports suggests that the presence of an overlay has not reduced legal risk for website owners:

25%
of all 2024 digital accessibility lawsuits targeted websites using overlays (UsableNet)
60%
increase in overlay-related lawsuits from 2022 to 2023
119
defendants sued while using an accessibility widget in May 2025 alone

Serial plaintiffs and their attorneys use tools like BuiltWith to identify websites with overlays, creating easy target lists for lawsuits.

In July 2024, according to reports from Freelock and others, Bloomsybox (an online flower delivery service) filed a class action lawsuit against UserWay, alleging it was sued for accessibility violations just six months after installing the overlay.

Source: Avoid Accessibility Overlay Tools — Accessibility.Works

Source: The Accessibility Overlay Trap — Freelock

Privacy Concerns

Concerns have been raised about overlays and data protection:

  • Some overlays may detect assistive technology usage without explicit user consent.
  • Information about assistive technology use can constitute sensitive personal data about disability status.
  • Some products may use cookies to track users across sites using the same overlay.
  • Organisations using such tools should consider whether this raises compliance questions under GDPR.


Source: Do Away with Overlays — Accessible Web

Source: The Deceptive Facade of Accessibility Overlays — AccessiTREE

The EU Position: Overlays Are Not Compliant

European Commission Statement (December 2023)

“Claims that a website can be made fully compliant without manual intervention are not realistic, since no automated tool can cover all the WCAG 2.1 level A and AA criteria. It is even less realistic to expect to detect automatically the additional EN 301 549 criteria.”

— European Commission, December 2023

EDF and IAAP Joint Statement (May 2023)

The European Disability Forum and International Association of Accessibility Professionals issued a formal joint statement specifically on accessibility overlays, concluding:

  • Overlays do not make websites accessible or compliant with European accessibility legislation.
  • They do not constitute an acceptable alternative or substitute for fixing the website itself.
  • Overlay technology can interfere with assistive technology and override user settings.
  • They strongly advise public and private sector buyers to engage with digital accessibility experts, persons with disabilities and their representative organisations.

European Accessibility Act (EAA) — In Force Since 28 June 2025

May 2023
EDF & IAAP Joint Statement on Overlays
Formal warning that overlays do not make websites compliant with European accessibility legislation.

December 2023
European Commission Statement
The Commission explicitly rejects overlay-based approaches for EN 301 549 compliance.

28 June 2025
European Accessibility Act Takes Effect
The EAA becomes law across all EU member states. Requires EN 301 549 / WCAG 2.1 AA compliance. Penalties include fines up to €3 million. Ireland’s implementation includes potential imprisonment.

Source: European Disability Forum — Joint Statement on Accessibility Overlays

Source: European Accessibility Act — Top 20 Key Questions Answered (Deque)

Source: European Accessibility Act — AbilityNet

Source: The EAA Comes into Effect — AccessibleEU Centre

Source: EAA Compliance Standards Requirements — Accessibility.Works

FTC Orders accessiBe to Pay $1 Million (2025)

In April 2025, the U.S. Federal Trade Commission approved a final order against accessiBe. The following is based on the FTC’s published complaint and final order:

  • The FTC ordered a $1 million payment
  • The FTC alleged that accessiBe had claimed its overlay could make any website WCAG-compliant within 48 hours
  • The FTC found these claims were false, misleading, or unsubstantiated
  • The FTC also alleged that accessiBe had paid for endorsements that were presented as independent reviews without adequate disclosure
  • Under the final order, the company is barred from making unsubstantiated compliance claims

The FTC’s complaint noted that the overlay failed to make basic website components — menus, headings, tables, images, and more — compliant with WCAG and accessible to persons with disabilities.

Source: FTC — Final Order Requiring accessiBe to Pay $1 Million

Source: Beware of AI Accessibility Promises — Lainey Feingold

Source: FTC Catches up to accessiBe — Adrian Roselli

The Overlay Fact Sheet: 800+ Expert Signatories

The Overlay Fact Sheet has been signed by over 800 accessibility experts, including:

 

  • The Chair of the W3C ARIA Authoring Practices Task Force.
  • Code contributors to the NVDA screen reader.
  • Accessibility leads from Fortune 500 companies.
  • Independent accessibility consultants worldwide.
  • Haben Girma, disability rights advocate and Harvard Law graduate.

 

The statement is clear: overlays are not an effective means of ensuring accessibility.

 

“Beware of companies claiming to use AI solutions to make websites accessible. AI is a tool, and right now it’s extremely limited in what it can do for accessibility.”

— Haben Girma

 

Source: Overlay Fact Sheet

What Genuine Accessibility Requires

Real, sustainable accessibility requires a fundamentally different approach:

 

  1. Comprehensive manual audits — expert testing with assistive technologies.
  2. Source code remediation — fixing the actual HTML, CSS, and JavaScript.
  3. Accessible content creation — training staff to produce accessible documents, emails, presentations, and learning materials.
  4. User testing — involving people with disabilities in design and testing.
  5. Ongoing monitoring — accessibility is not a one-time fix
  6. Organisational culture change — embedding accessibility into processes, procurement, and development workflows.

Key References

Disclaimer: This article represents our professional opinion based on publicly available sources, which are cited throughout. Where we refer to regulatory actions, legal proceedings, or statements by official bodies, we have attributed these to their original sources. We are not lawyers, and nothing in this article constitutes legal advice. Readers should consult qualified legal counsel for advice specific to their circumstances.

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