ChatGPT Writer is a free Chrome extension that allows users to generate entire emails and messages using AI. The extension works on all sites, but works even better on Gmail. It supports all languages and is 100% free and privacy friendly. To use it, users need to install the extension, click on the extension icon, briefly enter what they want to write about, and hit the Generate Response button. On Gmail, users can go to an email, reply to it, click the ChatGPT Writer extension button in the Gmail reply box, briefly enter what they want to reply to, hit the Generate Reply button and then hit the Insert Generated Reply button to insert it in Gmail's text box. ChatGPT Writer is a great tool for anyone who wants to quickly write emails or messages without having to type them out by hand.