Windows 10 Will Allow You To Create Or Rename Extension Only Files Easily

By Subhajit Ghosh

What is a file extension?

In Windows, a file extension tells your computer what type of application to use to open a file. The file extension is a three-letter code that appears at the end of a file name, although it is sometimes hidden (more about that in a minute). For example, if a file is named mythesis.doc, the .doc is the file extension, and it tells Windows that the file was created with Microsoft Word. If a file is called mythesis.xls, then the extension is .xls and this tells Microsoft Windows that the file was created with Excel.

Where are these file extensions?

Windows will hide all file Extensions by default. The idea is that most people won’t want to bother with extensions since changing a file extension can cause trouble (if you change it to the wrong thing) and since Windows mostly takes care of dealing with extensions behind the scenes. But until now in consumer OS extension only files were very hard to create and rename. You had to give any Alpha-Numeric or Character before .extension to save files easily. Which is not the case anymore.

Extension
File Options

In preview builds of Windows 10 19H1 and 20H1, Microsoft has added a new feature to the File Explorer which allows users to create and rename extension only files. We were able to reproduce the changes on both Windows 10 19H1 and 20H1 machines. Windows 10 version 1903/20H1 changes how the File Explorer handles the renaming of the file extensions and it’s a useful feature if you display the file extension. File Extension (such as .txt, .png, .jpg) is that which identifies the file type and there are many users who prefer to show File Extensions.

To show file extensions in Windows 10, you can search for File Explorer Options in Cortana and uncheck ‘Hide extensions for known file types’ in the views tab, as shown in the screenshot below. In Windows 10 October 2018 update or older, if you create or rename a file to a text that starts with a dot and file extension is not specified, the system displays an error message stating that ‘You must type a file name’. It is worth noting that there have been multiple ways to create or rename files to include dot prefix in earlier versions of Windows 10. For instance, users can also add a dot after the name of the file to skip the error.

Extension
Extension Only Not Possible
Extension
Extension Only Possible

In Windows 10 April 2019 Update and newer, the process has got a bit easier. File Explorer will now allow you to rename a file to be something like ‘.test’ directly from the desktop or folder. Previously there would be an error citing that you needed to provide a name. It’s a small change but it should help web developers and even normal users if they want to create a file that starts with a dot.

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