Product image SEO: alt text & file names
Product images can pull traffic from Google Images and help your product pages rank — if you get a few basics right. Here's what actually moves the needle.
What matters, in order
- Alt text. Describe the product naturally with useful attributes (brand, colour, type). Write for a person; don't stuff keywords.
- Image quality & speed. Clean, consistent, compressed images that load fast — page speed is a ranking factor.
- File names. Use words:
black-leather-wallet.jpg, notIMG_1234.jpg. - Crawlable & in the sitemap. Make sure images are indexable and listed.
Writing good alt text
Alt text exists for accessibility first and SEO second. A good pattern: [brand] [colour/material] [product type] — e.g. "black leather bifold wallet". Keep it under ~125 characters, skip "image of", and make every product's alt text unique.
The part most stores miss: consistency at scale
SEO basics are easy on one product and hard across hundreds. Shelfshoot keeps the image side consistent — same clean background, square crop and resolution on every product, published by SKU — so your catalogue is fast and uniform, which is the foundation good image SEO is built on.
Consistent, fast product images by default
Scan, shoot and publish clean, compressed images to every product. Try Shelfshoot free.
Try Shelfshoot freeFAQ
What should product image alt text say?
Describe the product clearly and naturally, including useful attributes like brand, colour and type — for example, "black leather bifold wallet". Alt text is for accessibility first and SEO second, so write for a person, not a keyword list.
Do image file names matter for SEO?
Yes, a little. Descriptive, hyphenated file names (black-leather-wallet.jpg) give search engines extra context. They matter far less than alt text, image quality and page speed.
Does image size affect SEO?
Yes. Heavy images slow pages, which hurts Core Web Vitals and rankings. Compress images and serve modern formats like WebP while keeping enough resolution to zoom.