This article describes what ZIP files are and why they're used in some situations. We'll also look at how to open one to see its contents, and how to convert the files inside to a different format ...

Windows will open RAR files, but to convert files to RAR format, you can make use of WinRAR or these free online tools. We show you how!

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.