1. Juicy Studio Image Analyzer – is a handy online tool that will look at each image on a given page and evaluate the following parameters:
- image width / height;
- alternative text;
- An URL to an image long description.
2. Alt Text Checker – (by Durham University) will list alt text information next to each image found on the page
3. Page Size Extractor – will give you a quick idea of how the page images influence the page size and hence load time by giving:
- total number of on-page images;
- The largest image size;
- The total image size.
4. Web Developer Firefox: Toolbar offers an array of image analyzing tools:
- display alt attributes;
- display image dimensions;
- display image sizes;
- display image paths;
- find broken images;
- outline images missing alt attributes;
- hide images / background images;
5. Firefox Accessibility Extension offers a most useful feature summarizing all page images in the form of a handy table (the feature can found under “Text equivalents” => “List of images“). The table is extremely easy to use as (1) it highlights “the problematic” images and (2) it can be sorted by any of the following parameters:
- Image alt text;
- Image source link;
- Image width;
- Image height

