Shodo is a Chrome extension that provides AI-powered Japanese proofreading and checking for text written on platforms like note.com, Gmail, Facebook, and Twitter. It detects unnatural grammar, typos, and factual errors in real time. The extension is free to use with optional paid plans that unlock additional features and higher character limits. After installing, users can quickly sign up and log in to the Shodo website to start using the service within seconds. It handles personal communications and website content.