#Why use an accessibility check
An accessible website can be used by everyone, including people who use a screen reader, rely on a keyboard alone or have low vision. Since 28 June 2025, the European Accessibility Act has applied to online shops and digital services, among others. The European standard behind it refers to WCAG level A and AA. What those guidelines ask for is explained in WCAG 2.2 explained and in the complete guide to website accessibility.
An automated check is the quickest way to see where you stand. It finds errors that turn up on page after page, such as images without alt text, form fields without a label or buttons without a name. These errors are common and usually quick to fix. There's an overview in the most common accessibility errors.
#How the check works
Flowproof uses axe-core, Deque's open-source testing library, limited to the rules for WCAG 2.0, 2.1 and 2.2 at level A and AA. The test runs on your page's HTML. For each rule you see the success criterion, the level, the impact and up to three examples of elements that fail, with a link to the explanation and fix on Deque's site. Rules that pass are shown too, so the report also tells you what's already in order.
Flowproof also checks three things axe doesn't cover: a link to an accessibility statement, a skip link and automatically playing sound. The accessibility score doesn't count towards the GEO score, but has its own score for each scan.
#What the check can't do
Automated testing has its limits. Flowproof doesn't measure colour contrast, because that can only be done reliably on a fully rendered browser page. Whether the reading order is logical, an error message understandable and a form usable with a screen reader needs to be judged by a person. The difference between automated and manual testing is explained in testing website accessibility.
#Who it's for
The accessibility check is included in Pro and Business. In Pro you can check up to 5 websites, with a weekly automatic scan and a PDF report. Agencies working for several clients can share the results in their own branding with Flowproof for agencies. The check runs in every scan, alongside the GEO audit. See the pricing or create a free account.