CSS Website Customizer & Share Tool

A web app that lets users add custom CSS to any website in real-time, preview changes, and share the customized version with others. Perfect for designers, developers, or anyone wanting to experiment with website styling without coding knowledge.

Browser extensions like Stylus already handle custom CSS injection with a loyal user base, and the "share a customized version" angle is where any real differentiation lives — but that's also a solved problem via tools like ScreenshotOne or simple CodePen embeds for devs who actually need it. The revenue story is unclear because designers willing to pay are already using Figma or browser devtools, and non-coders who "don't want to code" will struggle with raw CSS regardless of how clean the UI is. Seven cross-source mentions suggests mild curiosity but no real demand signal. The most likely failure mode is the core user contradiction: people technical enough to care about CSS don't need the abstraction, and people who need the abstraction can't use CSS.