7z
From Just Solve the File Format Problem
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== Format details == | == Format details == | ||
| − | The 7z format defines many compression methods. The ones normally used are [[LZMA2]] (default for 7-Zip 9.30 alpha | + | The 7z format defines many compression methods. The ones normally used are [[LZMA2]] (default for 7-Zip 9.30 alpha +), [[LZMA]] (default for 7-Zip prior to 9.30 alpha), [[PPMd]], and [[bzip2]]. |
== Identification == | == Identification == | ||
Latest revision as of 13:40, 8 August 2025
7z is a file format for archiving and data compression, developed by Igor Pavlov. It is the native format of the 7-Zip archiving application.
Contents |
[edit] Format details
The 7z format defines many compression methods. The ones normally used are LZMA2 (default for 7-Zip 9.30 alpha +), LZMA (default for 7-Zip prior to 9.30 alpha), PPMd, and bzip2.
[edit] Identification
7z files begin with signature bytes '7' 'z' BC AF 27 1C.
[edit] Related formats
[edit] Specifications
- Refer to the DOC/7zFormat.txt and DOC/Methods.txt files in the source distribution. (mirror on GitHub)
- .7z file format specification on the py7zr documentation
[edit] Software
- 7-Zip
- 7zX for Mac
- p7zip
- Radyx - creates 7-zip archives using only the LZMA2 compression algorithm provided by the Fast LZMA2 Library
