Interior photography has a specific compression problem: bright windows. A well-shot living room is usually the darkest thing in the frame next to the brightest thing in the frame, and JPEG handles that badly. Blown highlights around windows are cheap to encode, but the falloff into shadow — the gradient across a wall, the transition under a sofa, the sheen on a countertop — is where banding and blockiness appear first. That means a compression setting that looks clean on the sofa in the middle of the frame can visibly damage the shadow side of the same photo. The second pressure is volume. An interior project is not one hero image, it is twenty to forty frames across rooms, plus detail shots and mood boards, and designers send all of them to clients, printers, and platforms. Doing that at 8-12 MB per frame makes a gallery unusable on mobile and a delivery link miserable to download. Compressing to roughly 1600-2000px on the long side at a moderate setting keeps a client gallery looking like the photography it started as while cutting the whole set by an order of magnitude. Skwish does that in the browser for PNG, JPG and WebP with a per-file before/after readout and a ZIP download for the entire set. Nothing is uploaded, which matters when the photos are an unannounced client project.