Img missing an alt attribute

In the example below the img is missing an alt attribute.

Image without alt attribute

Image with alt attribute

Painting of Napoleon Bonaparte in His Study at the Tuileries

Best Practice

Any img element should provide alternate, text, content
Also applicable to <area> elements (image maps)

Spotting the issue in the tool

Lots of scanners will catch simple cases like this
More complex cases are something that has to be checked manually
It's an eash '

Demo Index