A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

Have you ever noticed how your computer knows which program to open when you double click on a file? It doesn’t always know but most of the time it does. When it doesn’t know, your computer will ask ...

Changing file formats in Windows 11 can be done via File Explorer for quick swaps. Command Prompt offers a trickier method to alter file extensions, but it must be done carefully. Compatible apps like ...

In amongst the barrage of jargon and mumbo-jumbo facing newcomers to the joys of personal computing is a tricky little beggar called the 'file extension'. This is the three or four letter/number code ...

The default setting for Windows is to not display a file's extension, which is the last period in a file name followed by 2 or 3 letters. Therefore, when viewing files in Windows you would only see ...

Jake Peterson is Lifehacker’s Tech Editor, and has been covering tech news and how-tos for nearly a decade. His team covers all things technology, including AI, smartphones, computers, game consoles, ...

You know those times when you want to upload a new photo to, say, Facebook or Pinterest? The typical browser-based upload tool forces you to click through countless ...

Since the early days of online video, various battles have been waged among competing video codecs and formats, but those battles were merely indicative of the larger struggle between those who ...