A product image can answer a buyer's question before they read a single line of copy. What color is it? What does the texture look like? Which variation is shown? Is the image showing the product, or showing how it is used?
Alt text has a narrower job: it gives someone who cannot see the image the information that image contributes on this specific page. The useful question is not “What keywords can I add?” It is “What would this page lose if the image disappeared?”
Decide the image's role before you write
The same photograph can need different alt text in two places. A close-up of a navy chair might be the main product image on a product page, a decorative accent in a design article, or a clickable image that opens a gallery. The surrounding purpose changes what matters.
Start with one of these roles:
- Informative: the image adds a product detail, comparison, feature, or instruction that is not already present in the adjacent copy.
- Functional: the image is a control or link. The alt text should communicate the destination or action, not every visual detail.
- Decorative: the image adds atmosphere but no information. It may need empty alt text in the final implementation rather than a long description.
That classification prevents a common mistake: writing a detailed visual inventory for an image that does not need one, or writing nothing for an image that carries a key product detail.
Build a useful first draft
Use the AI Alt Text Generator with the exact image that will appear on the page. If the nearby heading or paragraph explains why the image is there, add that copy in the optional context field. The tool can use it to produce a more relevant draft.
Keep the optional page URL and nearby copy public and non-sensitive. The context is there to clarify the image's purpose, not to paste a private product brief, a customer record, or an unpublished launch plan.
For a product image, the first draft usually needs three things:
- The visible subject: what product or product part is shown?
- The meaningful variation: color, orientation, configuration, or visible feature.
- The page-specific detail: what does this image prove or demonstrate for the reader?
For example, “Navy upholstered lounge chair with rounded back and wooden legs” is a reasonable starting point when the image is the primary product view. On a comparison page, the important part might instead be “Side view showing the chair's curved back and tapered wooden legs.”
Do a context check before publishing
Generated text is a draft, not an accessibility decision. Read it next to the image and nearby copy, then check the following:
- Does it mention a detail the reader actually needs?
- Does it repeat the heading word for word without adding anything?
- Does it claim a material, size, compatibility, person, or location that is not visible or verified?
- Does it contain a product keyword only because you wanted another place to put it?
- If the image failed to load, would the line help the reader understand the page?
If the answer to the last question is no, rewrite it. A short, honest description is more useful than a string of search terms.
Keep captions and alt text separate
A visible image caption can invite the reader into the story around an image. Alt text should focus on the information needed when the image is unavailable. Sometimes the two lines can be similar; often they should not be identical.
If you are unsure, draft the visible caption first, then ask what information would still be missing for someone who could not see the image. That missing information is a better guide for alt text than an SEO checklist.
A small product-image workflow
- Keep the original product photo.
- Crop or resize a copy for the placement where it will appear.
- Write or draft alt text for the version that is actually on the page.
- Add a visible caption only if it gives the reader useful context.
- Check the page in its final layout, including the image link or control behavior.
The action item is simple: pick one image on a live product or portfolio page today and compare its current alt text with the image's actual job. If the text could describe any image in the category, it probably needs a rewrite.
Find more publishing and document workflows in the Image Guides.
FAQ
Q: Should every product image use the product name in its alt text? A: Use the name when it helps identify the image, but do not repeat it mechanically. The useful part is usually the visible variation or feature that distinguishes this image from the others.
Q: Is alt text a ranking shortcut? A: No. Helpful alt text can support accessibility and make image context clearer, but it cannot compensate for weak product information or unrelated keywords.
Q: Can I use the same text for a caption and alt text? A: Sometimes, but only when the visible caption also communicates the information a non-visual reader needs. Treat them as two separate editorial decisions.