7-Zip is a free software/open source file archiver designed originally for Microsoft Windows. 7-Zip operates primarily with the 7z archive format, as well as being able to read and write to several other archive formats. In operation a user can use the command line, graphical user interface or Windows shell integration. 7-Zip began in 2000 and is actively developed by Igor Pavlov. It is related to a cross-platform port, p7zip.
The main features of 7-Zip
* High compression ratio in new 7z format with LZMA compression
* Supported formats:
o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS
* For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 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 69 languages
Compression ratio
We compared 7-Zip with some of the leading archivers.
– 7-Zip now can update solid .7z archives.
– 7-Zip now supports LZMA2 compression method.
– 7-Zip now supports XZ archives.
– 7-Zip now can unpack NTFS, FAT, VHD and MBR archives.
– 7-Zip now can unpack GZip, BZip2, LZMA, XZ and TAR archives from stdin.
– 7-Zip now can open/copy/compress disk images (like \\.\c:) from \\.\ folder.
– 7-Zip File Manager now doesn’t use temp files to open nested archives
stored without compression.
– New -scrc switch to calculate total CRC-32 during extracting / testing.
– New -scc{WIN|DOS|UTF-8} switch to specify charset for console input/output (default = DOS).
– Some bugs were fixed.
24.08 2024-08-11
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– The bug in 7-Zip 24.00-24.07 was fixed:
For creating a zip archive: 7-Zip could write extra zero bytes after the end of the archive,
if a file included to archive cannot be compressed to a size smaller than original.
The created zip archive is correct except for the useless zero bytes after the end of the archive.
When unpacking such a zip archive, 7-Zip displays a warning:
“WARNING: There are data after the end of archive”.
– The bug was fixed: there was a leak of GDI objects (internal resources in Windows)
in “Confirm File Replace” window, causing problems after 1600 displays of “Confirm File Replace”
window from same running 7-Zip process.
– Some optimizations for displaying file icons in 7-Zip File Manager and in “Confirm File Replace” window.
– Some bugs were fixed.
Added ISO7Z plugin support (17 Jul 2023)
- CCD/IMG – disc images created with CloneCD
- CDI – disc images created with DiscJuggler
- CHD (v4) – images used by MAME
- CSO
- CUE/BIN
- ECM – disc images compressed with ECM Tool
- GDI – Dreamcast Gigabyte disc images
- ISZ – disc images created with UltraISO
- MDS/MDF – disc images created with Alcohol 120%
- NRG – disc images created with Nero Burning ROM
- Zisofs compressed files
30 August 2024 – Tweak dark mode looks better.
(Freeware Silent Repack)
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