Learning how to compress images for your website is one of the highest-ROI skills a seller can pick up. A product photo straight from a modern phone can be 5 to 8 MB. Marketplaces will accept it, but huge files slow down your listing workflow, and on your own Shopify store they directly hurt page speed, search rankings, and conversions.
What compression actually does
Lossy compression (used by JPG and WebP) throws away image data your eyes cannot easily see: subtle color gradations and fine noise. Done well, a 70 to 80 percent smaller file looks identical to the original on screen. Done badly, you get blocky artifacts and muddy colors, especially in smooth gradients like skies or white backgrounds.
Pick the right format for product photos
- WebP: 25 to 35 percent smaller than JPG at the same quality, supported by all major marketplaces and browsers in 2026
- JPG: the universal fallback for product photography, best compatibility everywhere
- PNG: only for graphics, logos, or images needing transparency, never for photos
How much compression is safe
For product photos, a quality setting of 80 to 85 is the sweet spot. Below 70 you start seeing artifacts on close inspection, and above 90 the file size balloons for no visible gain. If you are exporting for the web, WebP at quality 80 beats JPG at quality 85 on file size nearly every time.
Compress a whole batch in seconds
Our free image optimizer handles the whole job: drop in up to 20 images, choose WebP, JPG, or PNG, drag the quality slider, and download everything individually or as a zip. You see the exact file size and savings percentage per image, so you can verify the tradeoff before you publish.
Build it into your workflow
The sellers with the fastest listing process compress once, at export time, and never think about it again. Shoot in the highest quality, edit, then export through the optimizer as the final step before uploading to Etsy, Amazon, or Shopify. Your listings load faster, your storage stays lean, and your photos still look flawless.