IZArc (pronounce like "easy-arc") is a file archiver for Microsoft Windows developed by Bulgarian programmer Ivan Zahariev. The program is freeware, but not open source. In addition to the the most commonly used archive formats, like zip, rar, gzip, tar.gz, bzip2, and 7z, IZArc handles an unusually large number of less common formats (48 in total, see below). Another distinguishing feature of IZArc is its ability to convert archives into different formats (including CD images and conversion between self-extracting and standard archives). When using the 7z format, IZArc achieves a very high compression speed equaled only by 7-Zip.