7z

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'''7z''' is a [[compression]] format. [[S7z]] appears to be a variant on it.
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'''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.
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== Format details ==
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7z supports several compression schemes:
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* [[LZMA]] (the default for 7-Zip prior to 9.30 alpha)
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* [[LZMA2]] (the default for 7-Zip 9.30 alpha +)
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* [[PPMd]]
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* BCJ
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* BCJ2
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* [[bzip2]]
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* [[DEFLATE]]
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== Identification ==
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7z files begin with signature bytes <code>'7' 'z' BC AF 27 1C</code>.
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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.
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== Related formats ==
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* [[S7z]]
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* [[UFA]] (predecessor?)
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* [[777]] (predecessor?)
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* [[BIX]] (predecessor?)
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* [[ARG]] (same author)
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== Specifications ==
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* Refer to the DOC/7zFormat.txt file in the source distribution
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** [http://cpansearch.perl.org/src/BJOERN/Compress-Deflate7-1.0/7zip/DOC/7zFormat.txt 7zFormat.txt]
  
 
== Software ==
 
== Software ==
* [http://www.7-zip.org/ 7-Zip]
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* [[7-Zip]]
 
* [http://7zx.en.softonic.com/mac 7zX for Mac]
 
* [http://7zx.en.softonic.com/mac 7zX for Mac]
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* [http://p7zip.sourceforge.net/ p7zip]
  
== See also ==
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== Sample files ==
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* https://telparia.com/fileFormatSamples/archive/7z/
  
* [[Wikipedia:7z]]
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== Links ==
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* [http://www.7-zip.org/7z.html 7-Zip page about 7z Format]
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* [[Wikipedia:7z|Wikipedia article]]

Revision as of 23:30, 24 August 2020

File Format
Name 7z
Ontology
Extension(s) .7z
MIME Type(s) application/x-7z-compressed
PRONOM fmt/484

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

7z supports several compression schemes:

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.

Related formats

  • S7z
  • UFA (predecessor?)
  • 777 (predecessor?)
  • BIX (predecessor?)
  • ARG (same author)

Specifications

  • Refer to the DOC/7zFormat.txt file in the source distribution

Software

Sample files

Links

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Variants
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