A live scan of one page that checks every image for missing alt text, oversized/uncompressed files, and legacy formats that could be WebP or AVIF. Free, no signup, one page at a time.
Free plan · 1 page test at a timeThis free tool checks images on one page at a time. Run a complete audit to check speed, meta tags, and mobile-friendliness together.
Run Free Website AuditImages are usually the heaviest part of any web page, and also the part most often overlooked for SEO and accessibility. This tool runs a real, timed fetch of a page you give it, finds every <img> element in the markup, and then sends live HEAD requests to each image URL to read its actual file size and content type — the same information a browser's network panel would show, not an estimate. From there it checks three things that consistently move both rankings and load time: whether each image has meaningful alt text (missing alt text hurts both screen-reader users and image search visibility), whether the file is served in a modern, compressed format like WebP or AVIF instead of legacy JPG/PNG/GIF, and whether any images are simply too heavy for the web (uncompressed originals are a very common and very fixable cause of slow pages).
This free version checks the first 30 images on one page at a time, which is plenty to spot patterns across a typical article, product page, or landing page. It reads the page's raw HTML rather than rendering it in a real browser, so it can't see images that are injected purely by JavaScript after the page loads, or images set as CSS backgrounds rather than <img> tags — for a full rendered audit of those cases, pair this with a browser-based tool like Lighthouse. Alt-text quality checks (generic vs. descriptive) are a heuristic, not a full language model — always give a real image a final human read before publishing.