2026-10-16

AI Alt Text for Ecommerce Images: A Practical Guide (2026)

How to use AI to draft accurate alt text for product images: what to include, what to avoid, a prompt, and a QA checklist for accessibility and image search.

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This is general guidance, not a ranking guarantee. Check your platform’s current documentation for image and accessibility features.

What alt text is for

Alt text describes an image for people who cannot see it and for software that reads pages. On a product page it should tell someone what the image shows, in the context of the product. It is first an accessibility feature; any search benefit is secondary.

What good product alt text includes

• What the image shows: the product, and the angle or scene if it matters (front view, in use, detail of the clasp).
• Real, visible attributes: color, material, style, if they are actually visible.
• The product name or type, once, naturally.
• Text that appears in the image, if it matters to the buyer.

What to avoid

• Starting with “image of” or “picture of”; screen readers already announce an image.
• Keyword stuffing or lists of search terms.
• Claims that are not visible or not true (certifications, “best”, “waterproof” unless it is a stated, verified spec).
• Identical alt text on every photo of a product. Differentiate views.
• Purely decorative images need empty alt text rather than filler.

How to use AI without making things up

1. Start with a fact sheet: product name, color, material, and what each photo shows.
2. Give the AI that sheet and a one-line description of each image. If you use a vision-capable tool that looks at the image itself, treat its output as a draft: such tools can misjudge colors, materials and counts.
3. Ask for one concise sentence per image and for “not visible” instead of guesses.
4. Review every line against the actual photo.

A starter prompt

Write alt text for product images. Use ONLY the facts below.
Do not guess materials, sizes or claims. Do not start with "image of".
One concise sentence per image, describing what is visible.

PRODUCT: ...
FACTS: color: ..., material: ...
IMAGES:
1. Front view on white background
2. Close-up of the stitching
3. Product in use, worn by a model

Return a numbered list matching the images.

Bulk catalogs

For large catalogs, generate drafts in batches, spot-check a sample from every category, and fix systematic errors in the prompt. See our bulk rewrite workflow for the same review approach applied to descriptions. Platform features and app pricing vary: check current pricing and capabilities on the vendor site. We have not tested specific alt text tools.

QA checklist

• Each alt text matches what is visible in that exact photo.
• No “image of” prefix, no keyword stuffing.
• Different views have different alt text.
• No unverified claims.
• Decorative images are marked decorative.
• Alt text is saved in the right field in your platform.

Bottom line

Let AI do the first draft, and keep a person responsible for accuracy. Pair this with the Shopify product page SEO checklist and our prompt templates for the rest of the page.