Yes, there is a way to preview an OFT email template in a browser, but the file cannot be opened directly because it is created for Microsoft Outlook. A browser such as Google Chrome supports only web formats like HTML.
One of the simple ways to do this is to first convert the OFT template into HTML. After that, the file can be opened in any browser, and the layout of the e-mail will look like a web page.
If Outlook is available, the OFT template can be opened there, after which it can be saved as HTML content. But when Outlook is not available, a small converter can come to the rescue. For instance, DataVare OFT to HTML Converter is able to convert OFT templates into HTML code so that the code can be easily previewed in a browser and still keep all the original formatting, as well as images and links.
Once the conversion is complete, you need only double-click the HTML file, and it will open in your browser for immediate preview.