Alt text presence for accessibility and SEO. Percentage of images without alt attribute.
We check alt text presence on all images. Alt text is important for accessibility, SEO, and display during slow loading.
Checks alt attribute presence on all images.
<img src="photo.jpg" alt="Description">
Checks if images have width/height to prevent layout shift.
<img width="800" height="600">
Checks for loading="lazy" on below-fold images.
<img loading="lazy">
Checks for modern image formats (WebP/AVIF).
<img src="photo.webp">
Images without alt text are invisible to search engines and inaccessible to screen reader users. Alt text also helps during slow loading.
Title, meta description — length, relevance, keyword presenc...
Heading structure, hierarchy, H1 presence, H1 length, duplic...
Word count, text-to-HTML ratio, placeholder text (Lorem Ipsu...
HTTP status, redirects, GZIP/Brotli compression, HTTP/2, HTM...
Core Web Vitals — LCP, CLS, TBT, FCP via Google PageSpeed In...
Internal and external links count, ratio, orphan page detect...
Schema.org JSON-LD — presence, types, and validation of requ...
Open Graph (og:title, og:description, og:image) and Twitter ...
Canonical URL, robots.txt, sitemap.xml, noindex/nofollow, hr...
HTTPS check, mixed content, HSTS, CSP, X-Frame-Options, emai...
DOM size, inline CSS/JS, render-blocking resources, lazy loa...
Keyword frequency, n-gram analysis, consistency across title...