Top 10 Accessibility Issues
Web developers worldwide have found 81 million A11Y issues on 10 million checked web pages.
Here are the most common issues detected by Rocket Validator.
Last update: Friday, February 21, 2025
1. All page content should be contained by landmarks. 40.12%
The recommended practice is to keep all content, excluding skip links, in designated areas such the header, nav, main, and footer.
2. Elements must meet minimum color contrast ratio thresholds. 29.04%
According to WCAG 2 AA contrast ratio thresholds, all text elements must have sufficient contrast between foreground text and background colors.
3. Links must have discernible text. 9.65%
When used as links, link text and alternative text for images must be recognizable by screen readers, have no duplicate labels, and be focusable.
4. All touch targets must be 24px large, or leave sufficient space. 7.45%
Touch targets must have a minimum dimension of 24 by 24 CSS pixels. The greatest unobscured area of the touch target is used to calculate size. The target must be at least 24 CSS pixels distant from any other touch target if its size is insufficient.
5. Elements must have their visible text as part of their accessible name. 3.40%
The visible label of interactive items labeled through their content must be included in their accessible name.
6. Images must have alternative text. 2.94%
To express their purpose and meaning to screen reader users, all images must include alternative text.
7. Heading levels should only increase by one. 2.36%
The h1 through h6 element tags must be in a sequential order for headings to be in a correct logical order.
8. Landmarks should have a unique role or role/label/title (i.e. accessible name) combination. 2.18%
Landmarks must have an unique role or role/label/title (i.e. accessible name) combination.
9. Document should have one main landmark. 1.44%
A best practice is to guarantee that there is only one primary landmark for navigating to the page’s principal content, and if the page has iframe components, each should contain either no landmarks or a single landmark.
10. Links must be distinguishable without relying on color. 1.42%
Make sure that people who can’t differentiate colors can tell when text is a link by checking that the link has either a distinct style that doesn’t depend on color or a contrast difference of more than 3:1, which tells you that manual testing is needed.
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