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About this tool
Check Shopify product photos against the 20 megapixel and 20 MB limits, the 800 px zoom threshold and your store's standard aspect ratio.
This checker tests a product photo against Shopify's published image limits before you upload it: a maximum of 20 megapixels, a maximum file size of 20 MB, a minimum of 800 x 800 px for product-page zoom, and 2048 x 2048 px as the recommended square size. It also compares the image to the single aspect ratio your store uses and reports how much a centre crop to that shape would remove, because Shopify's own advice is to keep one ratio across every product so collection grids line up.
Open Shopify Product Image Spec Checker on AltFTool — it loads instantly in your browser.
Upload or drag in the file you want to work with.
Adjust the settings and preview the result.
Download the finished file to your device.
The 20 MP and 20 MB ceilings are the two that actually block an upload, and they are checked separately.
Reports the exact percentage a centre crop to your store ratio removes.
Flags an image that will leave uneven padding next to the rest of your catalogue.
2048 x 2048 pixels for square product photos. That is Shopify's own recommendation: it is large enough for a sharp zoom on retina screens and comfortably under the 20 megapixel ceiling, and Shopify generates all the smaller variants automatically.
20 megapixels of resolution and 20 MB per file. A 6000 x 4000 px camera export is 24 megapixels and will be refused, so downscale before uploading rather than after a failed batch.
Product-page zoom needs at least 800 x 800 pixels. Below that there is nothing extra to magnify, so most themes disable the zoom cursor entirely.
Shopify recommends it. Collection grids reserve a fixed frame for every product, so mixing square and portrait photos leaves uneven white padding down the page. Pick one ratio — 1:1 and 4:5 are the common choices — and crop everything to it.