The default ZIP client in Windows support only ZIP archives .So Usually we need ,Winrar ,7Zip or similar desktop clients to open RAR ,7ZIP ,CAB and other archive formats . But there is web service that can be used to open these archives online .
WObzip is this web tool which allows the online extraction archive formats 7z, ZIP, GZIP, BZIP2, TAR, RAR, CAB, ISO, ARJ, LZHCHM, Z, CPIO, RPM, DEB and NSIS .
All the archives are scanned before they are downloaded to PC . This ensures the security of the user . Another advantage is that we don’t need any software to extract these archives . So this is greatly helpful in schools and colleges , if you have internet connection .
Try Wobzip