The image processing happens locally in the web browser.
Not to imply that hosting the static assets to power that (JS and WebAssembly binaries) is free, but it’s definitely much cheaper than the compute resources that would be required to do the heavy lifting server-side.
(Still worth paying for or allowing ads though. Photopea clearly took a lot of work to build)
lichtmetzger@discuss.tchncs.de 3 weeks ago
That is not true! You can figure that out for yourself - open up the site, disconnect your internet and resize/crop some images. It will do it just fine.