7-Zip 26.04 – Free File Compression & Archiving Software

Lightweight compression software with strong encryption, high ratios, and broad format support

2026-10-07

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7-Zip - Free open source file archiver for Windows with high compression ZIP and 7z

7-Zip is an open-source file archiver with a high compression ratio, predominantly for the Microsoft Windows operating system.

It can be used as a command-line tool or with a graphical user interface, integrating with the Windows shell environment.

Compression ratio results depend heavily on the data used for testing. Typically, 7-Zip compresses to the 7z format 30–70% more efficiently than the zip format. Additionally, it compresses to the ZIP format 2–10% more efficiently than most other ZIP-compatible programs.

7-Zip is free software, developed by Igor Pavlov and distributed under the GNU LGPL license. This file archiver is compatible with all Windows operating systems, from Windows NT to Windows 10 (both 32-bit and 64-bit).

7-Zip main features:

High compression ratio in the new 7z format with LZMA compression and LZMA2 compression
For ZIP and GZIP formats, the provided compression ratio 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 87 languages
Supported formats:
- Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
- Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR, and Z.

7-Zip – Pros & Cons

Pros	Cons
✓ Delivers a high compression ratio with the 7z format using LZMA and LZMA2 compression.	✗ The 7z format generally offers better compression than ZIP, but recipients may need compatible archiving software to open 7z files.
✓ Supports strong AES-256 encryption for both 7z and ZIP archives.	✗ Many formats are supported for unpacking only, meaning 7-Zip cannot create new archives in every format it can extract.
✓ Handles a wide range of archive formats, including 7z, ZIP, TAR, GZIP, ISO, RAR, WIM, and many others.	✗ Its extensive archive-format support and command-line capabilities can be more than necessary for users who only perform basic ZIP extraction and compression.
✓ Provides both a graphical file manager and a powerful command-line version, giving users flexibility for manual and automated workflows.	✗ The provided Windows compatibility information does not list Linux or macOS support, limiting the documented platform coverage.
✓ Integrates with the Windows Shell and supports self-extracting 7z archives, making common archive operations more convenient.	✗ Compression efficiency varies significantly depending on the type of data being archived, so the maximum compression advantage is not guaranteed for every file set.

Frequently Asked Questions

What is 7-Zip used for?

7-Zip is used to compress and extract files, create archives, and reduce the size of data for storage or sharing. It provides both a graphical file manager and a command-line interface and integrates with the Windows Shell.

Can 7-Zip open RAR files?

Yes. The program can unpack RAR archives, although RAR is supported for extraction rather than archive creation. It can also unpack many other archive and disk-image formats listed on the page.

Does 7-Zip support AES-256 encryption?

Yes. It supports AES-256 encryption for both 7z and ZIP archives. This lets users protect compressed files with a password before sharing or storing them.

Can 7-Zip create self-extracting archives?

Yes. It can create self-extracting archives in the 7z format, so recipients can extract the packaged files without manually opening the archive through the normal file manager.

What is the difference between 7-Zip and WinRAR?

7-Zip is free and open source, with high-compression 7z archives, AES-256 encryption, and support for creating 7z and ZIP archives. WinRAR focuses on RAR and ZIP archives and adds features such as RAR archive creation, recovery records for damaged archives, multi-volume archives, and AES-256 encryption; WinRAR is distributed as a trial product.