Image optimization for SEO
Images and speed
Images are usually the heaviest part of a page: they account for half or more of the total weight. Optimizing them is the fastest way to speed up a site and improve Core Web Vitals.
The tool finds images without alt, files that are too heavy, outdated formats and a lack of lazy loading.
Optimization checklist
Compress images when uploading them to the site, serve WebP/AVIF with a fallback, set width and height to prevent layout shifts (CLS), enable loading="lazy" for below-the-fold images.
Fill in alt meaningfully: describe what is in the image with a natural mention of the page topic. Yandex and Google image search is an underrated source of traffic.