Files with 7-zip extension are compressed archives in the 7-zip compression file format used by 7-ZIP tool for Microsoft Windows operating system, developed by Igor Pavlov.

Detailed description

Software that open 7-zip file

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7-ZIP file extension - 7z compressed archive

What is 7-zip file? How to open 7-zip files?

File type specification:

Archive and compressed file type icon Archive and compressed file type

7-zip file icon: 7-zip filetype icon

File extension 7-zip is used for native file format of 7-ZIP archiver

7z is the new backup and archive file format, providing high compression ratio.

The main features of 7z file format:
- Open architecture
- High compression ratio
- Strong AES-256 encryption
- Ability of using any compression, conversion or encryption method
- Support for very large files with sizes up to 16000000000 GB
- Unicode file name support
- Solid compression ratio
- Archive headers compression

7z file format has an open architecture, so it can support any new compression methods. LZMA is the default and general compression method of 7z file format.
The main features of LZMA are:

  • Variable dictionary size (up to 4 GB)
  • Compression speed: about 1 MB/s on 2 GHz CPU
  • Decompression speed: about 10-20 MB/s on 2 GHz CPU
  • Small memory requirement for decompression (depend from dictionary size)
  • Small code size for decompression: about 5 KB
  • Supports multi-threading and P4's hyper-threading

The LZMA compression algorithm is very suitable for embedded applications. LZMA is released under the terms of the GNU LGPL.

7-Zip supports encryption with the AES-256 algorithm. This algorithm uses a cipher key with a length of 256 bits. To create that key, 7-Zip runs a derivation function based on a SHA-256 hash algorithm. A key derivation function produces a derived key from the text password entered by the user. To increase the cost of an exhaustive search to crack a password, 7-Zip uses a large number of iterations when it produces a cipher key from a password.

7z file format was developed as as part of the 7-Zip compression utility distributed under the GNU LGPL.

MIME types:

Updated: April 6, 2024

The default software associated to open 7-zip file:

7-zip icon

Igor Pavlov logo7-zip  Microsoft Windows software

Company or developer:
Igor Pavlov

A free file archiver developed by Igor Pavlov featuring higher compression ratios with LZMA and LZMA2 compression.

It is mainly available for Windows platform (for Mac and Linux are available command line tools) and is the primary program to handle 7z archives. However, also supports various compression file formats.

Supported formats:

Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM


Help how to open:

Use 7-zip, or applications that support 7z archives include WinRAR, PowerArchiver, TUGZip, and IZArc.

How to convert:

Extract an archive and then use files from archive or backup files into another archive file format (eg. rar, zip etc.).

Find conversions from 7-zip file:

7-zip to 001

7-zip to bmz

7-zip to deb

7-zip to exe

7-zip to rar

7-zip to zip

Find converter to 7-zip file type:

001 to 7-zip

ace to 7-zip

bmz to 7-zip

cab to 7-zip

deb to 7-zip

egg to 7-zip

zip to 7-zip

File identification strings:

HEX code: 37 7A BC AF 27 1C
ASCII code: 7z '

List of software applications associated to the .7-zip file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open 7-zip file, edit 7-zip file, convert 7-zip file, view 7-zip file, play 7-zip file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting 7-zip files.

Software that open 7-zip file - 7z compressed archive

Programs supporting the exension 7-zip on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open 7-zip file action.

Microsoft Windows:

Main software associated with 7-zip file by default:
7-zip small icon 7-zip
Other suggested software:
WinRAR small icon WinRAR
PowerArchiver small icon PowerArchiver
ALZip small icon ALZip
PeaZip small icon PeaZip
Zipeg small icon Zipeg

Apple macOS / Mac OS X:

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