BulkGauge counts yours. The coverage audit reads your product images and reports how many have no alt text, broken down by product and collection. It writes nothing, costs nothing, and runs on the free plan.

Alt text is read aloud by screen readers and shown when an image fails to load. It is also read by search engines, which is why missing alt text is the first thing an SEO audit flags and why Google Images traffic tends to follow it.
Missing alt text is one of the most cited accessibility failures in ecommerce, and one of the few a merchant can fix across a whole catalogue in an afternoon.
Free, instant, no per-image cost.
{{product.title}} — {{option.Colour}} — {{image.position}} of {{image.count}}
Writes “Merino Crew — Charcoal — 2 of 5”. Good where the images of one product differ only by angle. Poor where the subject itself varies.
1¢ for each description generated. An image already described is reused at no charge.
“Grey ribbed wool sweater, crew neck, long sleeves”
Reads the image and describes what is in it. Worth it for art, homeware, and anything where two photos of one product show different things.
This is the one place a before-and-after table is useless. Every row shows the thumbnail, the description, and its length — and every row can be rewritten or rejected before anything is applied.

Yes, on every plan including Free. It is read-only — it reads your product images and writes nothing. Writing alt text in bulk needs the Growth plan.
1¢ for each description generated, on your existing Shopify invoice. Before a job runs you see the count, how many of those images are already described — those are free — and the total. You set your own monthly limit; a job that would pass it stops before it starts and offers you the two ways forward rather than charging through.
Reject the row. It is not written and not charged. The preview flags descriptions that conflict with the product’s own options, and you can edit any row by hand before applying.
No, and nobody should tell you otherwise. It fixes the most common single failure across a catalogue. Accessibility has many other requirements that no bulk tool can address.
Install, open Alt text, and read the count. Decide about writing it afterwards.