TikTok Shop is almost entirely a mobile experience, and the product grid inside the app competes for attention with video that is already optimised to load instantly. Heavy product photos lose that race. On top of that, a shop built from a phone camera roll arrives at sizes well beyond what a listing thumbnail needs, and often beyond the platform's upload limit. Skwish resizes product photos to a square listing frame and compresses them in the browser with a live size readout, so you can find the smallest file that still reads clearly as a thumbnail and holds up when a buyer taps through. Prepare a whole product set in one batch, export it as a ZIP, and keep your originals off any third-party server.