7z
From Just Solve the File Format Problem
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It supports several compression schemes: | It supports several compression schemes: | ||
| − | * [[LZMA]] (the default) | + | * [[LZMA]] (the default for 7-Zip prior to 9.30 alpha) |
| − | * [[LZMA2]] | + | * [[LZMA2]] (the default for 7-Zip 9.30 alpha +) |
* [[PPMd]] | * [[PPMd]] | ||
* BCJ | * BCJ | ||
| Line 16: | Line 16: | ||
* [[bzip2]] | * [[bzip2]] | ||
* [[DEFLATE]] | * [[DEFLATE]] | ||
| + | |||
| + | == Identification == | ||
| + | 7z files begin with signature bytes <code>'7' 'z' BC AF 27 1C</code>. | ||
| + | |||
| + | The 7-Zip software will automatically find embedded 7z data in many cases (but apparently not if the file extension is .7z). This makes it possible to create hybrid files that look like some other format, but which will be interpreted as 7z format by 7-Zip. | ||
| + | |||
| + | == Specifications == | ||
| + | * Refer to the DOC/7zFormat.txt file in the source distribution | ||
| + | ** [http://cpansearch.perl.org/src/BJOERN/Compress-Deflate7-1.0/7zip/DOC/7zFormat.txt 7zFormat.txt] | ||
== Software == | == Software == | ||
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== Links == | == Links == | ||
* [http://www.7-zip.org/7z.html 7-Zip page about 7z Format] | * [http://www.7-zip.org/7z.html 7-Zip page about 7z Format] | ||
| − | * [[Wikipedia:7z]] | + | * [[Wikipedia:7z|Wikipedia article]] |
Revision as of 00:55, 30 August 2014
7z is a file format for archiving and data compression. It is the native format of the 7-Zip archiving application.
It supports several compression schemes:
- LZMA (the default for 7-Zip prior to 9.30 alpha)
- LZMA2 (the default for 7-Zip 9.30 alpha +)
- PPMd
- BCJ
- BCJ2
- bzip2
- DEFLATE
Contents |
Identification
7z files begin with signature bytes '7' 'z' BC AF 27 1C.
The 7-Zip software will automatically find embedded 7z data in many cases (but apparently not if the file extension is .7z). This makes it possible to create hybrid files that look like some other format, but which will be interpreted as 7z format by 7-Zip.
Specifications
- Refer to the DOC/7zFormat.txt file in the source distribution
