IZArc (pronounced "easy-arc") is a proprietary file archiver for Microsoft Windows developed by Bulgarian programmer Ivan Zahariev. The program is freeware and closed source. In addition to the most commonly used archive formats, like zip, rar, gzip, tar.gz, bzip2, and 7z, IZArc handles a 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).

IZArc (as of version 4.1.2) currently supports the following file formats: 7-Zip, A, ACE, ARC, ARJ, B64, BH, BIN, BZ2, BZA, C2D, CAB, CDI, CPIO, DEB, ENC, GCA, GZ, GZA, HA, IMG, ISO, JAR, LHA, LIB, LZH, MBF, MDF, MIM, NRG, PAK, PDI, PK3, RAR, RPM, TAR, TAZ, TBZ, TGZ, TZ, UUE, WAR, XXE, YZ1, Z, ZIP, ZOO.

As of version 4.0 beta 1 IZArc adds Unicode support and more 7-zip support which solves some problems mentioned below.

IZArc's lack of support for Unicode limits its use across various languages^{[citation needed]}. IZArc does not support ISO editing. IZArc has incomplete 7-Zip support and lacks the add, move, or update actions, as well as encryption and parameter modification. Also unlike 7-zip, it does not appear to decipher Microsoft installer files (.msi) that include files compressed with LZX:21 and some setup files of type 7-zip.PE. While IZArc achieves a very high speed when compressing to the 7z format, and still a high speed with the widespread ZIP format, its compression is slow when handling other archive formats.