What the EAA Supplementary Images Rules Means For Your Website
Introduction
If you have arrived here by searching for “EAA supplementary images rule”, or something close to it, you are exactly the kind of person this post was written for.
My Bing search data has been showing me this search behaviour in real time. Businesses know something is required of their website images under the European Accessibility Act. They just do not know what it is called yet, so they are searching in their own words.
That is why this post exists; to give you the plain English answer that is surprisingly hard to find.
The European Accessibility Act came into force in June 2025. Most businesses do not yet know what it requires, particularly when it comes to the visual content on their website.
This article explains what the so-called “EAA supplementary images rule” means, why the phrase itself is not the legal wording, and what businesses need to understand about images, logos, diagrams, infographics, photographs, PDFs, screen readers, search engines, and AI systems.
Table of Contents
- What the EAA says about images
- The chain explained simply
- What this means in practice
- Who this applies to
- What the risk looks like
- How to find out where your website stands
- TL;DR
What the EAA says about images
The EAA does not use the phrase “supplementary images rule.” It’s how businesses are searching for it, which is precisely why this post exists.
The actual requirement is this: any image, logo, diagram, infographic, or photograph on your website that carries meaning must have a text alternative that explains what it shows.
The visual content on your website needs a hidden layer of information. It may not be visible on the page, but it needs to be readable by search engines, AI systems, and assistive technology. That hidden layer describes what the image contains and what it means.
For simple images, that may be alt text. For more complex images, such as diagrams, charts, and infographics, it may require longer descriptions. Decorative images that carry no useful information need to be marked so that screen readers skip them entirely.
That is the rule. Nothing more complicated than that.
The chain explained simply
Three terms come up in EAA compliance conversations. Here is what they mean and how they connect.
The EAA is the law. It says that digital products and services must be accessible. It does not spell out the technical detail of what accessible means in practice.
EN 301 549 is the European technical standard that the EAA points to. It defines what accessible actually means for websites, apps, and digital documents.
WCAG 2.1 Level AA sits inside EN 301 549. For websites, meeting WCAG 2.1 Level AA is effectively meeting the EAA requirement.
For images specifically, WCAG 2.1 requires alt text. This is descriptive text attached to each meaningful image that explains what it shows. For complex images like diagrams, charts, and infographics, it requires longer descriptions. Decorative images that carry no information need to be marked so that screen readers skip them entirely.
That is the chain.
The EAA creates the legal requirement. EN 301 549 explains the technical standard. WCAG explains what this means for web content. And for images, the practical requirement is clear: meaningful visual content needs a text alternative.
What this means in practice
The images, logos, case studies, project photographs, team photos, and downloadable documents on your website are not decoration. They carry information.
Under the EAA, that information needs to be accessible, not just to sighted visitors, but to anyone using a screen reader. It also needs to be understandable to every search engine and AI system that crawls your site.
Product and service images with no alt text are a compliance gap.
PDF reports and case studies that are image-based and unreadable to a screen reader are a compliance gap. Infographics that convey data with no text alternative are a compliance gap.
Project photographs with file names like IMG_4892.jpg and no description are a compliance gap.
Every one of those issues affects the hidden layer of your website.
And on most business websites, there are dozens of them.
Who this applies to
If your business is UK-based, this still applies to you if you have EU clients, EU operations, or if you supply to EU-based organisations.
The businesses that feel this most acutely are those working with public sector clients, procurement teams, funders, investors, and stakeholders.
Procurement frameworks across the UK and EU are increasingly asking about digital accessibility as part of the tender evaluation process. Non-compliance can be a disqualifying factor. That is not a theoretical risk. It is already happening.
What the risk looks like
The risk is not that businesses are suddenly being fined everywhere for inaccessible images. That would be too simplistic, and at the time of writing, confirmed EAA fines are still difficult to identify publicly.
The more important point is that the legal framework is now in place. The European Accessibility Act is enforceable, EU member states have created their own penalty and complaint routes, and accessibility has moved from best practice into regulated expectation.
For businesses, the risk is no longer just legal. It is also commercial.
A business that cannot demonstrate accessible digital content can start to look behind the standard, particularly in sectors where quality, governance, procurement, funding, and stakeholder confidence all matter. If your website contains inaccessible PDFs, missing alt text, unreadable infographics, and images that carry meaning without any text alternative, it raises a simple question: what else has not been checked?
That means the overwhelming majority of websites still have detectable accessibility issues, and missing alt text remains one of the most common problems.
Most do not know what their image and PDF layer looks like to a screen reader.
Most do not know what search engines can understand from their visual content.
Most do not know what AI systems can read, describe, or connect back to their business.
And that is the real risk, because you cannot fix what you have not looked at.
How to find out where your website stands
The Visual Image Checker™ shows you exactly what your images are communicating to Google, AI systems, and screen readers.
It is free, it takes thirty seconds, and you do not need any technical knowledge to use it.
Run any page of your website through it and you will see immediately whether your images have alt text, whether your file names are descriptive, and what information, if any, is actually attached to your visual content.
If what you find concerns you, that is the right place to start.
Knowing where you stand is always better than not knowing.
Run The Visual Image Checker™ free at: thevisualbusinessaccelerator.co.uk
Related reading:
Why Images And PDFs Are A Huge EAA Risk To Your Business And How To Solve It
TL;DR
The EAA does not use the phrase “supplementary images rule.” That is how businesses are searching for the issue.
What the EAA requires is that meaningful digital content must be accessible.
For website images, that means any image, logo, diagram, infographic, photograph, PDF, case study, or visual document that carries meaning needs a text alternative.
That may be alt text. It may be a longer description. It may be supporting text on the page. It may be an accessible version of a document.
But the meaning cannot only exist visually.
If your website has product images with no alt text, project photographs with file names like IMG_4892.jpg, PDF reports that cannot be read by a screen reader, infographics with no text alternative, or logos with no meaningful description, those are compliance gaps.
They are also visibility gaps, because the same hidden layer that helps screen readers also helps search engines and AI systems understand what your website is actually showing.
The first step is to check where you stand.
Run The Visual Image Checker™ free at: thevisualbusinessaccelerator.co.uk
