Why image SEO matters
Images can account for 50%+ of page weight. Missing ALT tags hurt accessibility and SEO. Modern formats (WebP, AVIF) reduce size by 25-50%. Lazy loading defers off-screen images, improving Core Web Vitals.
More tools
PageSpeed
Full Lighthouse audit.
Semantic HTML
HTML5 landmarks & accessibility.
Heading Checker
H1-H6 hierarchy analysis.
Image analysis on every page
Lumina checks ALT tags, formats, lazy loading, and file sizes automatically.
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