Ozon listing card
Ozon's seller help for product photos recommends 900 x 1200 pixels and states that every category is moving to the 3:4 vertical tile, with a 10 MB ceiling per file. A photograph from a phone or a camera is horizontal or 4:3, so the real work is choosing which part of it becomes the vertical card. The editor above is fixed at 900x1200 and exports JPEG, one of the formats Ozon accepts. Load the photo, place it behind the frame, and download. Nothing is uploaded on the way.
A 3:4 frame is taller than almost any source photograph is, so a horizontal shot loses its sides rather than its top. Scale the photo up until it covers the full height of the frame, then move it sideways until the product sits where you want it.
The card is shown small in search results and large on the product page, and a product pressed against the edge of the tile reads as a cropping mistake in both. Position the photo so the product is whole and centred, with an even margin around it.
The crop size and the export settings stay as they are when you load the next photograph, so the second and third images of a listing start from the same 900x1200 JPEG state rather than being set up again. Cropy works on one photo at a time, and this is what keeps a set consistent.
Ozon's seller help recommends 900 x 1200 pixels, accepts anything from 200x200 to 7680x7680, and states that all categories are moving to the 3:4 vertical tile. Ozon Fresh food cards use a 1:1 square instead.
No more than 10 MB per image. A 900x1200 JPEG is a fraction of that, and the editor shows the exact size for the current quality before you download.
JPEG, JPG, PNG, HEIC, and WEBP. This page exports JPEG. Cropy reads PNG, JPG, and WebP, so a HEIC photo has to be converted before it can be loaded here.
Not in one pass. Cropy crops one photograph at a time, but it keeps the size and export settings between photos, so the images of a card come out consistent without being set up again.