Shopify guide
How to optimize Shopify product images for Google
Google does not “see” a pretty photo. It sees a URL, bytes, ALT text, and whether the product page is indexable. Image SEO is the cheapest ranking lever most Shopify stores skip.
What Google actually uses
For product images, Google looks at the image file, the ALT attribute, nearby product title/description, and whether the page is in the sitemap and returns 200. A 4MB PNG on a product page slows the crawl and the shopper.
- •One primary image that matches the product (not a collage of four unrelated shots as the only file)
- •Descriptive filename before upload when you can (blue-linen-shirt.jpg, not IMG_2048.jpg)
- •ALT that names the product, not “image1”
- •Width large enough for zoom, file small enough for mobile
Dimensions and format
Shopify will serve resized copies, but it cannot invent detail or undo a 6MB original. Export around 2048px on the long edge for most catalogs. Use JPEG or WebP for photos; PNG only for graphics with hard edges.
If collection pages feel heavy, the theme is loading too many full-size images. That is a theme/app issue — see Shopify speed optimization.
On-page context
The product title and the first 160 characters of the description should match what is in the photo. Google Shopping and organic results both punish a mismatch (red dress in the image, “navy midi” in the title).
Use Seoi, or send the store for a check
Seoi compresses images, writes ALT text, and helps with titles/descriptions in one Shopify app — $3.99/month. Use it when you have hundreds of SKUs you will not edit by hand.