O365 Templater is a free Chrome extension designed to enhance your experience with Outlook Web by providing easy access to HTML templates and signatures. This tool allows users to manage and insert templates seamlessly, making email communication more efficient. Key features include quick insertion of templates and signatures, intelligent detection for personal or shared mailboxes, and an advanced HTML editor for creating and editing templates. Users can also create templates from selected text while maintaining formatting, and organize their templates in a user-friendly layout.

Additionally, O365 Templater supports importing and exporting templates in JSON format, enabling users to back up and share their work with colleagues. The extension is available in both Czech and English, ensuring localization for a broader audience. This tool is ideal for anyone using Outlook Web, particularly corporate teams and customer support personnel, looking to simplify their email processes.