How to Fix the 10 Most Common HTML Errors

The article lists the 10 most common HTML errors found in validator reports—missing alt attributes, unclosed tags, deprecated elements, missing DOCTYPE, missing lang attribute, duplicate IDs, incorrect nesting, missing viewport meta, empty headings, and excessive inline styles—and provides the correct fix for each. The author also promotes ValidateHTML, a free tool that automatically detects all 10 issues and assigns a quality score.