Houzz is unusual among portfolio platforms because its guidance pushes in two opposite directions. The photostream ranks on image size: Houzz's own pro guidance says photos need to be 1000 by 1000 pixels to show up at all and 2400 by 2400 to render on Retina displays, with 2560 by 2560 described as the ideal. But Houzz's own website builder takes a different stance — image blocks reject files at or above 2500 pixels in either dimension, and the page raises an error on save. So the same photo library has to serve a photostream that rewards pixels and a site editor that punishes them. The other half of the problem is file weight. A 2560px architectural photo straight out of a camera or a render is routinely 6-15 MB, and a project upload of twenty of those is a slow, failure-prone session. Neither constraint is about quality once you separate the two: you keep the pixel count the photostream wants and compress the encode and metadata bloat out of the file. Skwish resizes and compresses PNG, JPG and WebP in the browser with a before/after readout per file and a ZIP for the batch, so you can size for each destination and see the result before uploading. Nothing is uploaded anywhere.