Why thumbnails decide so much
On a marketplace or a quick-commerce app, a shopper scrolls past dozens of products in a few seconds. Your pack is a small square among many others, often under 200 pixels wide on a phone. If the product, the brand and the variant are not clear at that size, the full-size photo and the clever copy on the back never get seen.
What the checker shows
- Three real sizes. Roughly the sizes packs appear at in search results, quick-commerce tiles and cart suggestions on a phone.
- Greyscale. Many packs rely on colour alone. If yours disappears into its neighbours without colour, the shape, the contrast or the type is not doing enough work.
- The squint test. A blur shows which shapes survive at a glance. Usually it is one big block of colour and one big word. Make sure the big word is the right one.
- Next to rivals. Two plain placeholder packs sit beside yours, so you can see whether it stands apart in a row.
The checker also measures the contrast of your image and how much of the square the pack fills, and suggests what to try. It cannot judge your design; it can only show you what shoppers see.
Fixes that usually work
- Crop tighter. Many pack shots waste a third of the square on empty background.
- Make the variant name or colour band bigger than feels comfortable on the real pack.
- Shoot or render a hero image specially for marketplaces, straight-on, with the front face filling the frame.
- Check legal text needs (MRP, net quantity) on the full-size image, not the thumbnail; the thumbnail’s only job is to be recognised.
Your image is read by your own browser and drawn on the page. It is never uploaded to us or anyone else.