A fluent image description can still be the wrong alt text. Before accepting an AI-generated sentence, decide what the image contributes to that particular page.

For freelancers and small teams, start by reviewing five important images: a product photo, a linked logo, a screenshot, a chart and a decorative illustration. This small batch can reveal problems before you repeat them across a website.

Start with the image’s job

W3C distinguishes images that convey information, images that perform an action and purely decorative images. Informative images need their essential meaning conveyed. An image used as a button or link needs an alternative that communicates its function. Decorative images generally need an empty alt attribute rather than a description of their appearance.

Give the draft enough context

If you use an image-capable AI tool, provide the nearby heading, caption and purpose alongside an image you are permitted to share. Ask for a proposed alternative and an explanation of any uncertainty.

Try this instruction:

“Review this image in its page context. Suggest concise alt text where needed. Explain whether it conveys information, provides an action or is decorative. Flag unclear details and avoid inventing names, materials or product features.”

Check the result against the image yourself. Keep client-confidential material out of tools that have not been approved for that work.

Review meaning, then wording

Imagine a product page showing a backpack with an open side compartment. If that compartment is the feature being demonstrated, “Backpack with side compartment open” may be more useful than a description of the background.

An informative image’s alternative should communicate its meaning in context. A literal inventory of everything visible is not always helpful.

Give charts a separate check

A chart may need its values, relationships or explanation available elsewhere on the page. A short sentence naming the chart cannot automatically replace the information it contains. W3C’s alt-text decision tree helps identify these cases.

Keep SEO pressure out of the description

Google recommends useful, contextual alt text and warns against keyword stuffing. Repeating a target search phrase across every image does not make the page more useful to its reader.

Before publishing, review the alternatives in page order. Confirm that they explain the intended information or action without unnecessary repetition. This is a focused content check, not a complete accessibility audit.

Sources, checked 9 October 2026:

This is documentation-based guidance; the workflow and examples are editorial recommendations, not a hands-on product test.