7z
From Just Solve the File Format Problem
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(→Specifications: links to 7z github mirror and py7zr documentation) |
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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 == | ||
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== Sample files == | == Sample files == | ||
| − | * | + | * https://telparia.com/fileFormatSamples/archive/sevenZip/ |
== Links == | == Links == | ||
* [https://www.7-zip.org/7z.html 7-Zip page about 7z Format] | * [https://www.7-zip.org/7z.html 7-Zip page about 7z Format] | ||
* [[Wikipedia:7z|Wikipedia article]] | * [[Wikipedia:7z|Wikipedia article]] | ||
Revision as of 13:39, 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 |
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.
Identification
7z files begin with signature bytes '7' 'z' BC AF 27 1C.
Related formats
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
Software
- 7-Zip
- 7zX for Mac
- p7zip
- Radyx - creates 7-zip archives using only the LZMA2 compression algorithm provided by the Fast LZMA2 Library
