Image Optimizer

The Image Optimizer is a free tool that scans any public page and lays out every image on it in a visual gallery, with a clear checkmark for images that have real alt text and a warning for the ones that don't. Instead of opening dev tools and reading through raw <img> tags one at a time, you get an at-a-glance view of exactly which images on a page are missing the attribute that search engines and screen readers both depend on to understand what a picture actually shows.

It exists because missing alt text is one of the most common, and most invisible, gaps on a website. A page can look complete and load perfectly well while quietly excluding every one of its images from image search results, and leaving screen reader users with no way to know what those images contain. Running a scan — on your own pages or as part of a client audit — surfaces exactly which images need attention in seconds, instead of relying on someone stumbling across the gap by accident.

When you submit a URL, the tool fetches the page's live HTML and parses every <img> tag it contains, resolving each image's source URL so it can be displayed directly in the results gallery. For each image, the tool checks whether an alt attribute is present and whether it contains actual descriptive text, as opposed to being empty, missing entirely, or filled with a placeholder like the raw filename. Images with meaningful alt text are marked as passing, and images missing it are flagged so you can see exactly which ones need a fix.

This reflects the page's HTML response at the moment you run the scan — it does not execute JavaScript, so images injected purely client-side after page load may not appear in the results. Nothing about the page or its images is stored after your report is generated; each scan runs independently and on demand.

• Give every meaningful image real alt text. Screen readers and image search both depend on it entirely to understand what the picture actually shows — without it, that image is effectively invisible to both.
• Keep alt text short and specifically descriptive. Describe what's actually in the image rather than opening with "image of" or "picture of", which just wastes characters without adding information.
• Use an empty alt="" for purely decorative images. That tells screen readers to skip right over it, which is the correct, deliberate choice for spacers, background flourishes, or repeated icons with no informational value.
• Re-check alt text after a CMS migration or theme change. Bulk image imports and template swaps are a common way alt attributes get silently stripped or replaced with generic filenames across an entire site.