WinZip and WinRAR, these both are paid utilities to unzip files. But why spend money when you can get this same functionality for free. PeaZip is just a perfect utility which will help you to unzip various formats. PeaZip is available for Windows and Linux, plus it’s freeware. Some people may think that there is no alternative, but it is not so. The interface of this utility is very easy to use, and it can even convert one type of archive to another.
This is taken from the official site of PeaZip
PeaZip is an open source file and archive manager: cross platform, available as portable and installable software for 32 and 64 bit Windows (9x, 2k, XP, Vista, 7) and Linux (PeaZip is a desktop neutral application).
Free Alternative to WinZip and WinRaR
This small nifty utility can read or extract 126 different file type extensions. Yes, you won’t find this feature in any other archive utility. Oh and don’t worry about ZIP or RAR format, because it can compress and extract both of these popular formats.
You can also convert archive format to different ones. E.g. if your archive is in 7Z format, then you can convert it to ZIP format also. Just open that archive and click on convert.
PeaZip is available for download for two platforms, Windows and Linux. Also you can download the portable version or setup file. Just head over to the official PeaZip Website and download this utility. Now is the time to try out this freeware.