# Only 2.6% of Top Websites Have Fully Valid HTML

An analysis of the most visited websites found that just 2.6% of them have fully valid HTML. This indicates that the vast majority of major sites fail to meet web standards, which can impact accessibility, cross-browser consistency, and maintainability. The findings highlight a widespread but often overlooked technical debt across the web.

**Importance:** 2/5

## Sources

### Technology
- [Hacker News](https://validatehtml.com/html-error-statistics) — Wed, 12 Aug 2026 13:44:01 +0000