How to Open .Ai Files. A file with the .ai extension is an Adobe Illustrator vector graphic file. Adobe Illustrator is a professional drawing and design application, and saves drawings in a vector ...

When you save the MS Word document as a webpage, then it in saved with the extension .htm and the format is HTML. When you click on this HTML file, it will open with your default browser.

Notepad saves a file in .txt format. By using Print to PDF and Save As options, you can save it as PDF and HTML in Windows 11/10.