Does Squarespace compress images? What it sent Chrome for 621 images
Yes. On 25 September 2026 we asked Squarespace's image server for 621 images from 85 Squarespace sites, once the way Chrome asks and once the way a browser without WebP support asks. On 84 of those sites Chrome got a WebP that Squarespace had made itself, for every JPG and PNG upload. Squarespace's resized JPEG copies were encoded at quality 85, its WebPs came closest to quality 85 of the settings we tried, and none of the 35 uploads wider than 2,500 pixels came back wider. At 1,000 pixels wide, Chrome's WebPs of JPG uploads weighed 24% less in total than the JPEG copies Squarespace sends browsers without WebP. Chrome's WebPs of PNG uploads were lossless and weighed more than twice as much as the PNG copies those browsers get, cut to 256 colours or fewer. GIFs went out as GIFs. What that means for your uploads is in the list near the end.
