Data Compression Websites

Patent free, high-quality data compressor for Windows or Unix.

An open source file archiver with a high compression ratio. GUI and command line options. GNU LGPL license.

Windows compression utility using the ARJ format (was called ArjFolder). Can extract, test, and view files stored in ZIP, GZIP, TAR, CAB, RAR, ACE, PK3, etc. and create SFX executables.

Windows zip utility that prides itself on being small, fast and efficient.

Encoding for Amigas that uses large match offsets and file merging.

Utility to convert any ZIP file into a self-extracting executable. Supports AES encryption, can unpack automatically to a temporary directory and run a setup.exe after extraction.

Free archiving utility with Windows integration, script support and ZIP-64 for huge archives. Provides a free support forum.

Open source command line data stream compressor and archiver.

An open source Java utility for comparing two zip files. Also suitable for JAR, EAR, WAR and RAR files.

A small GUI utility for working with files in gzip format. It allows to compress any file into gzip format, decompress and test the integrity of already gzipped files.

A small GUI utility for working with files in bzip2 format, compressing, decompressing and testing the integrity of bzip2 files.

Compact Windows compression program that creates small .DZ archive files. Integrates with Windows Explorer.

Portable, open source UNIX decompressor for the Microsoft Cabinet (.CAB) format.

Offers a free implementation of the ARJ archiver for several operating systems such as DOS, Windows and GNU/Linux.

Presents this free, open source archiver featuring volume spanning, authenticated encryption and compression in several formats. Includes download links, documentation and a support forum.

Free Mac OS X file archiver with the main compression core p7zip

Open source archiver for Windows and Linux. Documentation, screenshots, research articles.

A free archiving utility designed specifically for Mac.

Free file compression software for Windows based on 7zip for Windows. Supports zip, jar, xpi, 7z and other formats.

Freeware file archiver for Windows with a large number of supported formats like 7z, ISO, BH, TAR and others. Developed by Bulgarian programmer Ivan Zahariev

A free compression and decompression tool for Windows, Linux, Mac and Android. Works with b1, zip, 7z, rar and other archive formats.

UnRarX is a free archive extractor for Mac OS X. Works with rar format only.

A free program that lets you make self-extracting archives under Win32 platform.

All-in-one free zip archiver that supports ZIP, 7Z, RAR and other formats.

Free data decompression frontend of libxad for OS X, Linux

Tool for opening RAR archives. The website itself contains books, apps and other content.

Archive decompression and browsing utility to extract files from ZIP, RAR and other archives. Supports Windows and Macintosh OS X.

ZIP or unzip a file or folder using a single line of code with this free component. [ActiveX DLL]

Flexible self-extractor that can be used with any zip tools that create type 0/8/9 format zip files.

Free file archiver for Windows. Supports many compression formats, totally free, is translated into various languages.