Weasel is a Windows input method that provides a native implementation of the Rime input engine for Windows 8.1 through Windows 11.
The tool solves the problem of typing Chinese and other complex scripts on Windows by wrapping the Rime input engine, an open-source framework designed to support multiple input methods. Weasel allows users to switch between different input schemes—such as Pinyin, Zhuyin, Cangjie, and others—using keyboard shortcuts like Ctrl+` or F4. The input method integrates with Windows' standard input language selection, registering itself as a keyboard layout option during installation. Users can customize dictionaries, input schemes, and visual styling by editing configuration files stored in the user's AppData folder, then redeploying the changes through the settings interface.
Weasel is appropriate for Windows users who need to input Chinese characters or other scripts supported by Rime's ecosystem. It suits both casual users seeking a straightforward input method and advanced users who want deep customization of input behavior and appearance. The README mentions that Linux users should use ibus-rime, fcitx5-rime, or fcitx-rime instead, and macOS users should use the separate Rime distribution for that platform, indicating that Weasel is Windows-specific and not a cross-platform solution.
The project maintains active development with contributions from multiple developers across program design, input scheme maintenance, and visual design. The tool includes a variety of pre-packaged input schemes covering Pinyin variants, Zhuyin, and Cangjie, while additional schemes can be installed through a separate package manager. The project provides both general Rime customization documentation and Weasel-specific styling and behavior guidance through its wiki.
