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Win7z is a 7z compression software after the WinZip, WinRAR Because 7z format has higher compression ratio than RAR, Zip, so you use it to compress documents will save more disk space. Win7z supports many types of common file formats, this is same as WinRAR, WinZip. It has more powerful self-extracting format. Users can use to create simple installation, backup files. Most importantly it is completely free in any environment you can use it free, including commercial, enterprise. Win7z supported formats: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR. OS requirements: All Windows