What is the maximum image resolution / file size?
You can upload any image resolution. The maximum supported output resolution is 25 megapixels (e.g. 6250 × 4000 or any other aspect ratio). Images larger than that are automatically resized.
For preview images, the maximum output resolution is 0.25 megapixels (e.g. 625 × 400).
Remove.bg currently supports images with a file size of up to 12 megabytes.