Can it cut the product out of its background?

Yes. In "Remove background", choose "Things & animals" to cut out products, small objects and pets (for people, "Person" is quicker and cleaner on hair). Thin parts, clear glass and parts the same colour as the background are hard: look at the result and paint it right with "Touch up".

Are the photos uploaded?

No. Cropping, erasing and compressing run in the browser; press "Network" in the bar to see for yourself.

Finish product photos for a shop

From a phone photo to a square, tidy product picture that loads fast, without uploading anything. For a pure white background, the product can be cut out and set on white.

Open Crop to a square

Steps

Photograph the product on a plain white sheet or wall, in soft daylight. A clean background saves the most work.
For a pure white background, drop the photo on "Product photo on white" ("Things & animals" is already chosen). The first time, the cut-out model (about 83 MB) is fetched into this browser. Paint over anything left behind or cut away with "Touch up".
Drop the photos on "Crop to a square" and place the product in the middle.
If something stray is in the picture, paint over it in "Erase" and it is filled in from its surroundings. The first time, the eraser model is fetched into this browser.
Hand the result to "Compress" with the preset "Product photo (under 500 KB, JPG)". One at a time is free; several at once needs the Pass ("batches").

Questions

Can it cut the product out of its background?: Yes. In "Remove background", choose "Things & animals" to cut out products, small objects and pets (for people, "Person" is quicker and cleaner on hair). Thin parts, clear glass and parts the same colour as the background are hard: look at the result and paint it right with "Touch up".
Are the photos uploaded?: No. Cropping, erasing and compressing run in the browser; press "Network" in the bar to see for yourself.

Pictures are never uploaded; the work is done in this browser.