Why Your Product Photos Look Blurry After Compressing (and How to Avoid It)

The real reason compressed product photos come out blurry or blocky, why it's almost never the compression tool's fault, and the settings that keep listing photos sharp at a small file size.

When a product photo looks soft, blocky or smudged after compressing it, the instinct is to blame the compressor — but in the vast majority of cases the file was already set up to fail before compression even started. Compression removes detail the image no longer needs; it can't remove detail that was never there or fix a mismatch you didn't notice.

Resizing down and compressing are two different jobs

Shrinking a photo's dimensions (from 4000px wide to 1200px wide) and compressing its file size (reducing JPG quality) are separate operations that solve separate problems. Compressing a huge image without resizing it first still leaves every one of those millions of pixels in place, just recorded with less precision — which is exactly what produces that smudged, muddy look. Always resize to the actual dimensions the listing will display before compressing.

Compressing an image that's already been compressed

JPG compression is lossy — every time a JPG is re-saved, it throws away a little more detail, and the blocky artefacts from the previous save get baked in and re-compressed on top. A photo that has been exported from a phone, edited, exported again, uploaded to one platform, downloaded, then compressed again for another platform has usually been through this cycle three or four times before it reaches your tool. Always compress from the original, uncompressed source file, not from a copy that was already saved as a JPG somewhere else.

Pushing the quality/compression slider too far

Below roughly 60-70% JPG quality, compression starts discarding information the eye actually notices — fine texture, subtle gradients, and text become visibly blocky. For most product photography, 75-85% quality keeps the image visually indistinguishable from the original while still cutting file size dramatically; going lower saves only a little more space for a much bigger visible hit.

The wrong format for the content

JPG compresses photographs well because it is built for gradual colour transitions, but it compresses flat colours, sharp edges and text badly, producing visible ringing artefacts around logos or typography. A product photo with a text overlay or a flat-colour background often looks noticeably better exported as PNG (for the overlay) or at a slightly higher JPG quality than a plain photo would need.

Our image compressor lets you resize and adjust quality in the same step, with a live before/after preview so you can see exactly where sharpness starts to drop — entirely in your browser, without uploading the original photo anywhere.