🚨90% of Sites Have HTML Errors; Accessibility Issues Rampant
Most websites are riddled with HTML errors and accessibility issues
TL;DR
A study finds that over 90% of the top 5,000 websites contain HTML errors, with CSS issues also widespread. Accessibility violations are nearly universal, raising compliance concerns under the European Accessibility Act.
According to a recent analysis, 90.5% of sites have at least one HTML error, while 65.1% suffer from CSS mistakes. The median site has 12 HTML errors and just one bad CSS declaration. This impacts web developers as it highlights the need for stricter validation tools and practices. With the European Accessibility Act in effect since June 2025, ensuring compliance is crucial.
Key Points
90.5% of the Tranco top 5,000 websites contain at least one HTML error
65.1% of these sites also suffer from CSS issues across linked stylesheets
Median site has 12 HTML errors and just one bad CSS declaration
Accessibility failures are near-universal on analyzed sites
European Accessibility Act applies since June 2025, impacting compliance
Why It Matters
If you're auditing a website for accessibility or HTML/CSS standards, this study highlights the need to focus on specific error types. The median site has 12 HTML errors and one bad CSS declaration, but structural issues are more common than typos. With the European Accessibility Act in effect since June 2025, ensuring compliance is now a legal requirement.
Frequently Asked Questions
Why does this matter?
If you're auditing a website for accessibility or HTML/CSS standards, this study highlights the need to focus on specific error types. The median site has 12 HTML errors and one bad CSS declaration, but structural issues are more common than typos. With the European Accessibility Act in effect since June 2025, ensuring compliance is now a legal requirement.
What happened?
A study finds that over 90% of the top 5,000 websites contain HTML errors, with CSS issues also widespread. Accessibility violations are nearly universal, raising compliance concerns under the European Accessibility Act.
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