Bulk add image alt text to your Shopify products
Hundreds of product images with empty alt fields means lost image-SEO traffic and an inaccessible store. Lasso writes descriptive alt text for every image — from the photo itself or from a template — and stages it all for review before a single field changes.
Install Lasso freeJust say it like this
How it works
- 1
Choose the scope and style
Whole catalog, one collection, or a filter. Pick written-for-you descriptions (from the image + product context) or a deterministic template — and whether to fill only empty fields or overwrite.
- 2
Review every line
One staged change per image, each showing the draft alt text next to the image it describes. Edit any wording before it ships.
- 3
Apply — emailed when big
Small sets finish in chat; whole catalogs run as a background job and email you when the drafts are staged. Apply when ready, undo in one click if needed.
Nothing ships without a preview — and everything has undo
Every change Lasso makes is staged in a project first, with a visual before/after diff for each item. Nothing touches your live store until you click Apply — and every apply snapshots the previous values, so one click reverts the whole batch. You also get a per-row report of exactly what succeeded and what didn't, plus a downloadable pre-apply backup for big jobs.
Frequently asked questions
Why does image alt text matter for a Shopify store?
Two reasons: image SEO (alt text is how search engines understand your product photos, and image search drives real traffic) and accessibility (screen readers read alt text aloud, and stores are increasingly expected to meet accessibility standards). Most catalogs have hundreds of images with empty alt fields.
How does Lasso write alt text for an image?
Lasso looks at the image itself plus the product context (title, vendor, type) and writes a short, specific visual description — colors, materials, composition — optimized for screen readers and image SEO. No filler like "image of".
Can I use a template instead of generated descriptions?
Yes. For deterministic alt text use a template like "{title} — {vendor}" and Lasso renders it per image, including an "image 2 of 4" position when products have galleries.
Will it overwrite alt text I already wrote?
Only if you ask it to. The default fills empty alt fields and leaves existing alt text alone — flip one option to overwrite everything instead.
How many images can I do at once?
Any number. Whole-catalog jobs run in the background — close the tab, and Lasso emails you when every draft is staged. You review the suggestions and apply (with one-click undo, like everything in Lasso).
Close your store's biggest SEO gap in an afternoon — without typing alt text 600 times.
Install Lasso free — takes 60 seconds