Why semantic HTML matters
Semantic HTML helps search engines understand page structure and improves accessibility for screen readers. Using <main>, <nav>, <header>, <footer> instead of generic <div> elements provides meaningful structure.
More tools
Heading Checker
H1-H6 hierarchy analysis.
Image SEO
ALT tags, format, lazy loading.
PageSpeed
Full Lighthouse audit with accessibility score.
Semantic analysis on every page
Lumina checks HTML5 landmarks, semantic elements, and accessibility automatically.
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