VibeCSS – AI-powered live web design prototyping in Chrome

Summary: VibeCSS enables rapid prototyping by applying AI-generated CSS changes directly on live web pages through plain language commands, eliminating the need for coding or developer tools. It uses a custom Atomic State Engine to manage CSS specificity and conflicts, allowing seamless design experimentation on the actual DOM.

What it does

VibeCSS lets users select any element on a live page and describe desired changes in plain language, which the AI then converts into CSS updates instantly. It also refactors copy, swaps icons, and restructures HTML while maintaining site context like color palette and typography.

Who it's for

It is designed for designers and developers who want to quickly prototype UI ideas and test new designs directly within the browser.

Why it matters

It removes the friction of manual CSS editing in browser dev tools by providing an intelligent assistant that understands page context and handles styling conflicts automatically.