Red Eye Rose received a file with a strange extension. She doesn't know into what program she should load it. Neither does Windows.

How to Open Unrecognized File Extensions. In most cases, the majority of the file extensions you encounter on your computer are already associated with a program or protocol. When a file extension ...

How to change the default program a file opens with in Windows 7 When you open files that have a particular file extension, Windows will look at its configuration to determine what the default ...

You can create a file without a File Type Extension in Windows 11/10 by carefully following the steps laid down in this post.

In the Mac OS it is possible to change the default program the operating system will use to open a file when you double-click on it. After you have changed this file association, though, you may ...

Learn how to rename all file extensions in a folder & sub-folders at once on Windows 11/10. You can batch rename or rename all file extensions in bulk using this guide.

These techniques—editing file extensions, changing formats, and trying different apps—will only get you so far. In order to rescue truly corrupted files, you’ll need a dedicated repair tool.

When it comes to converting file extensions on your iPhone, don't worry about downloading a third-party app when you can make the changes yourself.