A 7-z file extension is related to the 7-zip compression tool. A 7-z file contains compressed archive.

Detailed description

Software that open 7-z file

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7-Z file extension - 7z compressed archive

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

File type specification:

Archive and compressed file type icon Archive and compressed file type

7-z file icon: 7-z filetype icon

Default file extension for 7z compressed archive file is 7z.

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

The main features of 7z 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 has an open architecture, so it can support any new compression method, too. The following methods currently are integrated into 7z:

LZMA Improved and optimized version of LZ77 algorithm
PPMD Dmitry Shkarin's PPMdH with small changes
BCJ Converter for 32-bit x86 executables
BCJ2 Converter for 32-bit x86 executables
BZip2 Standard BWT algorithm
Deflate Standard LZ77-based algorithm

LZMA is the default and general compression method of 7z format. The main features of LZMA are:

  • High compression ratio
  • 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 is part of the 7-Zip program distributed under the GNU LGPL.

The default software associated to open 7-z 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 some of the suggested applications below 7z file extension description.

How to convert:

Use 7-zip to convert 7z archive to another archive format.

Find conversions from 7-z file:

7-z to 001

7-z to deb

Find converter to 7-z file type:

001 to 7-z

ace to 7-z

arj to 7-z

bzip2 to 7-z

cb7 to 7-z

deb to 7-z

List of software applications associated to the .7-z 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-z file, edit 7-z file, convert 7-z file, view 7-z file, play 7-z file etc. (if exist software for corresponding action in File-Extensions.org'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-z files.

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

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

Microsoft Windows:

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