Image SEO checklist for e-commerce product photos
Product photos are where image SEO checklists are usually written for, and where the mistakes are usually the most expensive – a single un-optimized product photo repeated across fifty size and color variants isn't one mistake, it's fifty. Here's what actually matters, roughly in order of effort-to-impact.
1. Rename every file before upload
IMG_4821.jpg becomes blue-ceramic-coffee-mug-handmade.jpg. Do this before the file ever reaches your store platform, renaming after upload usually means the URL is already set and you're stuck with the original name regardless. See How descriptive file names affect image search ranking for the full reasoning.
2. Write real alt text for every angle, not just the hero shot
A product with five angle photos needs five different alt text descriptions, each describing what's actually different in that shot ("shown from the side" or "open, showing the interior"), not the same sentence copy-pasted five times, and not left blank on anything past the first image. See What alt text actually does for image SEO.
3. Skip the keyword-stuffed metadata fields
Don't spend time typing keyword lists into a photo's IPTC fields hoping it helps ranking, it doesn't, per Google's own documented signals. Spend that time on alt text instead. See IPTC keywords vs. alt text.
4. Compress images before upload
This one isn't about what's in the image, it's about how fast the page loads. Page speed is a confirmed Google ranking factor, and uncompressed product photos are one of the most common causes of slow e-commerce pages. Export at a reasonable quality (80-85% JPEG quality is usually visually indistinguishable from 100% and a fraction of the file size) and use a modern format like WebP where your platform supports it.
5. Serve the right size, not just a compressed one
A 4000px-wide photo scaled down by CSS to display at 400px still forces every visitor's browser to download the full 4000px file. Use your platform's responsive image support (srcset, or whatever your e-commerce platform generates automatically) so browsers download a size that actually matches where it's displayed.
6. Add Product structured data
Product schema (JSON-LD) lets Google associate a photo directly with a product's price, availability, and reviews in search results. Most e-commerce platforms generate this automatically, but it's worth confirming the image field in your Product schema actually points at your real, optimized product photos and not a placeholder.
7. Keep a consistent background or style across your catalog
Not a ranking factor Google has confirmed, but consistent product photography reads as more trustworthy to shoppers, which affects click-through and conversion once someone does find you in search. Worth doing for reasons beyond SEO.
What to skip
Don't bother with keyword-stuffed file names or alt text ("blue-mug-buy-cheap-mug-mug-sale.jpg"), it reads as spam to both shoppers and Google, and there's no evidence it helps. Don't manually retype the same information for every size or color variant of the same product either, if your platform lets you template alt text and file names from product data (name, attribute, angle), use that instead of typing each one by hand.
Where this gets unrealistic to do by hand
Items 1-3 are the ones that scale badly: a catalog of a few hundred products with multiple angles each means a few thousand individual file names and alt text descriptions, all needing to be specific, not templated boilerplate. That's the batch problem TagDuck is built around: upload a product shoot, and it generates a distinct file name, description, and keyword set for every photo automatically.