7-Zip is a open source file archiver with a high compression ratio. The program supports 7z, XZ, BZIP2, GZIP, TAR, ZIP, WIM, ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, Z. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions. Check license information here: 7-Zip license.
You can use 7-Zip on any computer, including a computer in a commercial organization. You don"t need to register or pay for 7-Zip.
The main features of 7-Zip are:
- High compression ratio in 7z format with LZMA compression
- Compression ratio for ZIP and GZIP formats: 2-10 % better than the ratio provided by PKZip and WinZip
- Strong AES-256 encryption in 7z and ZIP formats
- Self-extracting capability for 7z format
- Integration with Windows Shell
- Powerful File Manager
- Powerful command line version
- Plugin for FAR Manager
- Localizations for 74 languages
What"s new in 21.04 Beta:
- 7-Zip now reduces the number of working CPU threads for compression, if RAM size is not enough for compression with big LZMA2 dictionary.
- 7-Zip now can create and check "file.sha256" text files that contain the list of file names and SHA-256 checksums in format compatible with sha256sum program.
- 7-Zip can work with such checksum files as with archives, but these files don"t contain real file data.
The context menu commands to create and test "sha256" files:
- 7-Zip / CRC SHA / SHA-256 -> file.sha256
- 7-Zip / CRC SHA / Test Archive : Checksum
The commands for command line version:
- 7z a -thash file.sha256 *.txt
- 7z t -thash file.sha256
- 7z t -thash -shd. file.sha256
Other changes:
- New -shd{dir_path} switch to set the directory that is used to check files referenced by "file.sha256" file for "Test" operation.
- If -shd{dir_path} is not specified, 7-Zip uses the directory where "file.sha256" is stored.
- New -xtd switch to exclude directory items from processing.
Download: 7-Zip 21.04 Beta (64-bit) | 1.4 MB (Open Source)
Download: 7-Zip 21.04 Beta (32-bit) | 1.1 MB
View: 7-Zip Website | Release Announcement