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7z compressed archive
File type: Archive and compressed file
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.
File type category:
Archive and compressed file
Date updated: July 19, 2025
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:
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:
application/x-lzma
Use 7-zip, or applications that support 7z archives include WinRAR, PowerArchiver, TUGZip, and IZArc.
Extract an archive and then use files from archive or backup files into another archive file format (eg. rar, zip etc.).
Software applications that can open 7-zip files:
Apple macOS / Mac OS X
Software applications that can edit 7-zip files:
Microsoft Windows
Software capable of saving 7-zip files:
Microsoft Windows
Software apps that export 7-zip files:
Microsoft Windows
Software apps that extract 7-zip files:
Apple macOS / Mac OS X
Software apps that backup 7-zip files:
Microsoft Windows
Software applications that handle other tasks involving 7-zip files:
Microsoft Windows
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