"Kyupiin Cat Image Maker" Gets 500,000 Visits on Day One, Yet Server Costs Were "Zero" — What Was the Secret?

"InspirationCat," a web app that turns cat photos into "inspired" images with background removal and comic-style burst lines, drew 500,000 visits on its first day.

The app runs AI processing entirely in the browser using ONNX Runtime Web and related tools, rather than sending images to a server.

Its static site is hosted on Cloudflare Pages, allowing operation without maintaining servers.

The design keeps costs and operational burden low, while also avoiding storing user images on the server.