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7z compressed archive
File type: Archive and compressed file
A 7-z file extension is related to the 7-zip compression tool. A 7-z file contains compressed archive.
File type category:
Archive and compressed file
Date updated: July 19, 2025
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:
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.
Use some of the suggested applications below 7z file extension description.
Use 7-zip to convert 7z archive to another archive format.
Software applications that can open 7-z files:
Microsoft Windows
Software applications that can edit 7-z files:
Microsoft Windows
Software capable of saving 7-z files:
Microsoft Windows
Programs for viewing 7-z files:
Microsoft Windows
Software apps that create 7-z files:
Microsoft Windows
Software apps that convert 7-z files:
Microsoft Windows
Software apps that extract 7-z files:
Microsoft Windows
Software apps that backup 7-z files:
Microsoft Windows
Software applications that handle other tasks involving 7-z files:
Microsoft Windows
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