No. Dropstitch does not compress or change your images, and currently supports uploads up to 20 MB per image. For the fastest uploads, use JPG photos straight from the camera, usually around 0.5 MB to 2.5 MB each, and if you shoot on iPhone switch HEIC to JPG first in Change iPhone default photo format. If you notice softer image quality on a live marketplace, that is usually caused by the marketplace's own image delivery and compression rules, not by Dropstitch.
Does Dropstitch compress my images?
Dropstitch does not compress your images, and this article explains the upload limits and recommended file formats.