Open the JPG image file you want to convert into an icon. With the plugin, you merely need to save the file with the file extension of .ico to create the icon.

Icons use the ICO file extension, but due to file formatting issues, it won't work to simply change the file extension of a JPEG file to ICO.

FileTypesMan allows you to view, add, remove edit file extensions and types on Windows 11/10. You can always manually set or change File Associations & Extensions.