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PeaZip
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free rar files extraction

file manager and compression software

PeaZip, free archiver utility, Open Source WinRar / WinZip alternative for Windows and Linux.
Compress to 7Z, ARC, BZ2, GZip, PAQ, PEA, self-extracting archives, TAR, WIM, XZ, ZIP files.
Open 150+ file types, including ACE, CAB, DMG, ISO, RAR, UDF, ZIPX format.
Extract, create and convert archives, split / join files, strong encryption, encrypted password manager, secure delete, find duplicate files, compute hash, export job definition as script to automate backup / restore.

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free zip files extraction


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Free 7zip files utility

7Z file format (7-Zip archives)


How to manage, open and extract 7Z files


How to manage, open and extract 7Z files


What is 7Z extension


7-Zip7-zip packages is a popular modern Open Source file archiver created by Igor Pavlov (freeware, first release 1999), supporting data compression protocols which features native UTF-8 support for filenames, Rijndael/AES encryption, volume spanning, and high compression ratio - in most cases even better that WinRar's proprietary RAR format, at expense of more memory and CPU intensive compression process.

7Z7zip archive format extension identify native 7-Zip's archiving format, providing very high compression ratio through powerful compression algorithms (LZMA/LZMA2, PPMdWikipedia prediction by partial matching, BZip2) that can take benefit of parallel computing on modern multicore CPUs. XZ is a pure compression format, based on LZMA/LZMA2Lempel Ziv Markov chain algorithm algorithm family.

7-Zip was developed for Microsoft Windows platforms, and ported by p7zipp7zip project (POSIX-7Zip) team on Unix platforms.
PeaZip uses the components from both those projects (that are released under LGPL license, as PeaZip) to offer the same opener / extractor GUI frontend to create, browse, test and extract 7z and ZIP archives under Linux and Windows operating systems as well.


How to compress files to 7Z format


manage 7zip 7z file format

To create a 7Z archive, or add files to an existing 7Z file
  • Drag and drop files from the system to a PeaZip instance; if you are browsing an existing archive you will be asked if you want to add files to the archive or create a new one
  • Select files and folder and use system's context menu entry Add to archive
  • Select files in PeaZip and use Add button or application's context menu entry
From main archive creation interface, and from "Advanced" tab, you can choose compression settings (faster or higher compression level, algorithm , solid compression block size, compress open files, create a self extracting archive so recipient will not need an archive manager program to extract the data...) and set encryption (recipient will need to enter a password to read/extract the archive).
It is also possible to set creation of multiple volumes declaring the output size (spanned archive), in order to keep the output size below mandatory limits (e.g. upload or mail attachment size).

From "Console" and "Schedule" tab, the compression / backup task created in the GUI can be saved as command line script and (on MS Windows operating system) scheduled for execution at fixed time intervals (hour, day of the week or of the month) - same apply for extraction / restore tasks, as the same tabs are featured in archive extraction interface.

Convert button allows to extract and repack 7z files into any other write-supported format (zip, arc, tar...), optionally keeping or discarding original archives. File converter also makes possible to convert any type supported for reading (e.g. ACE, CAB, RAR, TAR, ZIP...) into 7Z.


How to open (browse) and extract a 7Z file


To open or extract (decompress) .7Z archives or .XZ files

  • Use context menu entry "Extract here" or "Extract here (to new folder)" for quick extraction
  • Use context menu entry "Extract..." to be asked for output path and other options
  • Open the archive in PeaZip and use "Extract" button (you can chose output path, enter password and other options before confirming with "Ok") to extract selected object, or Extract > Extract all in application's context menu to extract all the archive
  • Open the archive in PeaZip and drag & drop desired objects from the application to the system (the opposite of aforementioned operation of adding objects to the archive by drag & drop)
  • Open the archive in PeaZip and doubleclick on an archived file to open and view its content in preview mode, without actual extraction taking place

Manage encrypted 7Z archives


To create, or extract, an encrypted .7z file
  • enter the password in PeaZip clicking the padlock icon extract encrypted 7z file in the status bar (in the file/archive browser) or below output address field (in extraction or archiving interfaces), or click Tools > Enter password / keyfile in main menu, or press F9 accelerator key.
"Keyfile" field is optional, leave it blank if you don't want to rely on two factor authentication - keyfile is the "what you have" element (needs to be handled safely), password (or passphrase) is the non-material  "what you know" element; both are needed for recovering the encrypted file content.
Use of keyfile increases security over password only encryption since also having access to the keyfile will be required to perform the extraction, eliminating the need of overly complex passwords to resist to social engineering profiling, and brute-forcing or dictionary attacks.

Topics: 7z file format specifications7zip files, how to compress, convert, open and extract 7z files wiki, 7zip, 7-Zip, free 7Z file opener and extractor, view, browse, explore, navigate, read .7Z extension archives, manage and unpack 7z format, decompress .7z package, download 7zip player / reader / viewer / manager utility, handle encrypted 7z file, password protected archive

Related articles: Convert 7z archives, Encryption, Extract encrypted file, ACE files, CAB archives, Extract RAR files, TAR format, ZIP files, Extract ZIPX, SFX self extracting archivesHow to split and join files

FAQ > Archive management > Handle 7 Zip .7z files





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