Is AI-generated alt text good enough for accessibility compliance?

Reviewed AI-generated alt text is fine and far better than the empty fields most stores have. Unreviewed output is risky for images carrying information — charts, size guides, diagrams — because a generator describes what an image looks like, not necessarily what it means. Review those manually.

Can AI see my product images to describe them?

It depends on the tool. Some generate alt text from product metadata (title, type, colour variant) rather than analysing the image itself. Others read the image directly. Metadata-based generation is accurate for standard catalog shots and weaker for lifestyle or detail crops, where the frame differs from the listing.

How long does bulk alt text generation take?

Generation itself is minutes for a few hundred images. Realistic total time including review is one to three hours for a 300-product catalog — versus roughly 20 hours writing every one by hand.

How to Generate Shopify Image Alt Text With AI (Bulk Guide)

A 300-product catalog with four images each needs 1,200 pieces of alt text. At a minute apiece that is 20 hours of repetitive work with no visible change to the page — which is precisely why most Shopify stores have alt text on the homepage banner and empty fields everywhere else.

Bulk generation solves the arithmetic. Here is how to do it without producing keyword soup that helps nobody.

First: Find Out How Bad It Actually Is

Before generating anything, measure the gap.

Shopify's admin does not surface alt text coverage in bulk, so the practical options are:

Export products to CSV (Products → Export) and check the Image Alt Text column for blanks
Run a free site crawler and filter for missing alt attributes
Use an SEO app's audit if you already have one that reports on it

You will usually find one of two patterns: alt text on the first image of some products and nothing else, or nothing at all.

Understand What Your Tool Is Actually Reading

This is the distinction that determines output quality, and most tools do not state it clearly.

Metadata-based generation builds alt text from the product title, type, and variant — for example, "Charcoal Merino Base Layer" becomes Charcoal merino base layer. Fast, cheap, accurate for standard catalog shots on white backgrounds. Weak for lifestyle and detail images, where what is in the frame differs from the product title.

Vision-based generation analyses the image itself and can describe a hiker on a ridge or a close-up of stitching. Better for varied imagery, generally slower and more expensive.

For most catalogs, metadata-based generation handles the primary product shots well, and the lifestyle and detail images are where you should expect to intervene.

Set the Rules Before You Generate

Bulk output is only as consistent as the instruction behind it. Decide up front:

Under 125 characters, always
No "image of" or "photo of" — screen readers announce it already
Include the product name, but phrased as description not listing title
Note the view for gallery images (front, back, detail, in use)
No keyword stuffing — a hard rule, not a preference

Without an explicit length and phrasing rule, generated alt text drifts long and starts reading like a product title.

Generate in Batches, Not All at Once

Run one collection first. Review the whole batch. Adjust. Then continue.

Generating 1,200 alt texts before looking at any of them means discovering a systemic phrasing problem 1,200 times instead of 30.

Review These Three Categories by Hand

Most generated alt text can ship after a spot-check. Three categories genuinely cannot:

Charts, size guides, and diagrams. A generator describes appearance; these images carry information. "Size chart" is a failure — the useful version states the actual range, or better, the data lives in a real HTML table with the image marked decorative.

Images where the frame differs from the product. A lifestyle shot of a model on a mountain generated from the product title will describe a garment, not a scene.

Anything with text baked in. Promotional banners with headlines need the text conveyed, and ideally should not exist as images at all.

Then Push It Back to Shopify

Options, in order of practicality:

An app that writes directly to Shopify — no export/import cycle, fewest opportunities for error
CSV export → generate → re-import — works, but a malformed import can overwrite live product data, so back up first
Manual entry — only sane for small catalogs

If you take the CSV route, export a fresh backup before importing anything. A bad import is one of the few genuinely destructive operations in the Shopify admin.

What You Actually Get From This

Benefit	Realistic expectation
Accessibility	Real and immediate — screen reader users can perceive your catalog
Image search traffic	Modest but genuine, compounds over time
Legal exposure	Reduced; accessibility claims against ecommerce sites are common
Ranking impact	Small and indirect

The honest framing: alt text is not a ranking lever. It is an accessibility obligation with a modest SEO side benefit — and the accessibility case is the one that should drive it.

Keep It From Regressing

Bulk generation fixes today's catalog. New products reintroduce the gap immediately.

The durable fix is generating alt text as part of adding a product, not as a periodic cleanup project. Otherwise you repeat this exercise every six months.

Wrivo AI generates alt text in the same pass as descriptions, SEO titles, and meta descriptions, and can run across a whole collection at once — so it happens as part of the normal product workflow. Free plan, unlimited products.