Quick 7z Extractor can extract 7z, RAR, ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RPM, SquashFS, UDF, VHD, WIM, XAR, and Z archives.

Despite the name 7z, it can open almost every imaginable archive out there. While the majority of archives are ZIP and RAR, there are those times you need to open an oddball file format.

The program is relatively small, very fast with a minimalist GUI. Just select the file you want to open and select extract.

Quick 7z Extractor does not have a lot of features other full blown compression utilities do, but that's not what it's for. If all you need to do is open an occasional archive, this could be just what you need.