Shopify SEO guide

Image Alt Text for Shopify SEO

What alt text is, why it matters for SEO and accessibility, how to write it well, and how to add it across your catalog.

Image alt text is the short written description of an image that lives in your page’s code. It does two important things: it tells screen readers (and shoppers who can’t see the image) what the picture shows, and it helps Google understand and rank your images. On a Shopify store with dozens of product photos, good alt text is quiet, compounding SEO.

Why alt text matters

Accessibility: screen readers read it aloud, so visually impaired shoppers can navigate your store. It’s also the right thing to do — and increasingly an expectation.
Image SEO: descriptive alt text helps your products appear in Google Images and image-rich results, a real traffic source for visual products.
Fallback: if an image fails to load, the alt text shows in its place.

How to write good alt text

Describe what is actually in the image, specifically and briefly. Include the product and a distinguishing detail, and work in a relevant keyword only where it fits naturally.

Good: “Macassar ebony wayfarer sunglasses, front angle on white background.”
Weak: “sunglasses” or “IMG_2043.jpg”.

Keep it under ~125 characters, don’t start with “image of” (screen readers already announce it’s an image), and don’t keyword-stuff.

How to add alt text in Shopify

For a single image: Products → open a product → click an image → Add alt text. To do it across many products, export your products to CSV and edit the Image Alt Text column, or use an app that generates alt text from the product context. Either way, review the result — auto-generated alt text that only describes pixels (“a brown object”) is worse than one good sentence that knows what the product is.

Common mistakes to avoid

Leaving alt text blank (the default for most uploaded images).
Reusing the exact same alt text on every image of a product.
Stuffing keywords instead of describing the image.
Using the filename (“DSC_0091”) as the alt text.

The fastest method: generate in bulk, review, publish

OnBrand AI writes unique descriptions, SEO titles & meta, and alt text across your whole catalog in your brand voice — you review Before vs. After and publish only what you approve.

Get OnBrand AI on the Shopify App Store →

Frequently asked questions

Does image alt text help SEO?

Yes. Descriptive alt text helps search engines understand your images, which supports rankings in Google Images and image-rich results, and it improves accessibility — a signal of a well-built page.

How long should alt text be?

Aim for a single descriptive sentence, roughly under 125 characters. Long enough to describe the image specifically, short enough that a screen reader isn’t reading a paragraph.

Can I add alt text to all images at once in Shopify?

Not from the standard product page, but you can bulk-edit via CSV export/import or an app that generates and applies alt text across products. Review the output before saving.

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