全角半角テキスト変換 is a Chrome extension that allows users to easily convert text between full-width and half-width characters, uppercase and lowercase letters, hiragana and katakana, and spaces. With this tool, users can quickly convert text without the need to retype it, especially when encountering errors in input forms such as addresses or phone numbers.

This extension adds a set of conversion functions to the right-click menu when selecting text. Users can choose to convert "All to Full-width", "English Characters to Uppercase", "English Characters to Lowercase", "English Characters to Full-width", "English Characters to Half-width", "Half-width Space to Full-width Space", "Full-width Space to Half-width Space", "Hiragana to Katakana", "Katakana to Hiragana", "Full-width Katakana to Half-width Katakana", and "Half-width Katakana to Full-width Katakana".

With its simple and intuitive interface, 全角半角テキスト変換 is a handy tool for users who frequently need to convert text in Chrome. It is free to use and can be easily installed as a Chrome extension.