A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

On computers and mobile devices, file extensions are the suffixes that apps append to filenames. When you see an item like "document.docx" for example, the .docx extension tells the computer and the ...

If you have a folder containing countless files of different formats, you can follow this guide to sort Files by Extensions into a separate Folder in Windows 11/10. No third-party app is needed since ...