tweakcn is a web UI styling tool and frontend design editor used for client-side theme customization. It functions as a style injector that applies dynamic theme overrides by inserting style rules into the document head at runtime.
The project provides a visual interface for adjusting user interface components and design settings through built-in presets and custom CSS values. It utilizes JSON-driven configuration and preset mapping to manage application appearance and brand identity without the need to manually edit stylesheet files.
The tool enables visual design management and rapid iteration of colors and layouts. It supports interface appearance management through CSS-variable-based theming, global state theme switching, and a CSS variable cascade.
