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peazip PeaZip is a free cross-platform file archiver that provides an unified portable GUI for many Open Source technologies like 7-Zip, FreeArc, PAQ, UPX...
Extract over 130 archive types: ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX and more...
Features of PeaZip includes extract, create and convert multiple archives at once, create self-extracting archives, split/join files, strong encryption with two factor authentication, encrypted password manager, secure deletion, find duplicate files, calculate hashes, export job definition as script.
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software specifications and features

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peazip features
PeaZip is an open source file and archive manager: cross platform, available as portable and installable software for 32 and 64 bit Windows (9x, 2k, XP, Vista, 7) and Linux x86 and x86-64 (PeaZip is a desktop neutral application).

Full support: 7z, FreeArc's arc/wrc, sfx (7z and arc), bz2, gz, paq/lpaq/zpaq, pea, quad/balz, split, tar, upx, zip

Read (browse, extract, test) 134 file extensions: 7z, bz, bz2, bzip2, tbz2, tbz, gz, gzip, tgz, tpz, tar, zip, zipx, z01, smzip, arj, cab, chm, chi, chq, chw, hxs, hxi, hxr, hxq, hxw, lit, cpio, deb, lzh, lha, rar, r01, 00, rpm, z, taz, tz, iso, jar, ear, war, lha, pet, pup, pak, pk3, pk4, slp, [Content], xpi, wim, u3p, lzma86, lzma, udf, xar, dmg, hfs, part1, split, swm, tpz, kmz, xz, txz, vhd, mslz, apm, mbr, fat, ntfs, exe, dll, sys, msi, msp, ods, ots, odm, oth, oxt, odb, odf, odg, otg, odp, otp, odt, ott, gnm, doc, dot, xls, xlt, ppt, pps, pot, docx, dotx, xlsx, xltx, swf, flv, quad, balz, zpaq, paq8f, paq8jd, paq8l, paq8o, lpaq1, lpaq5, lpaq8, ace, arc, wrc, 001, pea, cbz, cbr, cba, cb7, cbt (and more...)

Repair: FreeArc's arc/wrc

PeaZip allows to create, convert and extract multiple archives at once; create self-extracting archives; bookmark archives and folders; apply powerful multiple search filters to archive's content; export job definition as command line; save archive's layouts; scan and open with custom applications compressed and uncompressed files etc...
Other features: strong encryption, robust file copy, split/join files (file span), secure data deletion, compare, checksum and hash files, system benchmark, generate random passwords and keyfiles.

PeaZip can extract most of archive formats both from Windows and Unix worlds, ranging from mainstream formats as 7Z, RAR, TAR and ZIP to experimental ones like PAQ/LPAQ family, currently the most powerful compressor available.
PeaZip supports creating archives with a wide range of compression and encryption standards, and allows to export job definition as scripts to bridge the gap between GUI and console applications, and let the user pick the best of the two worlds.

PeaZip is a reliable solution for most of the archive types you may met, and will help you in finding the right tool for a wide range of specific needs if you are searching for speed, or maximum compression, or strong encryption.

PeaZip has secure deletion feature, can verify file checksum and hash, and supports multiple strong encryption standards, optionally using two factor authentication (password and keyfile) for increased security:
  • 7Z's AES256 encryption
  • ZIP WinZip's AE encryption based on AES256 (and ZipCrypto for legacy compatibility); can decrypt PKZip's AES encryption
  • FreeARC's ARC: AES256, Blowfish, Twofish256 and Serpent256; this format also supports recovery records to protect data against corruption
  • PEA: AES256 EAX authenticated encryption
PeaZip is focused on security and supports multiple strong encryption standards.

You can use PeaZip on all Windows version and on Linux (PeaZip is a desktop neutral application) with the same features and look and feel; moreover, for both platforms, PeaZip is also available as standalone, portable application not needing installation.

You can bring PeaZip with you and rely on it on multiple platforms.

Free as in freedom
PeaZip is freeware, free of charge for any personal and corporate use, and is also free as in freedom since it's released under Open Source license LGPLv3.

PeaZip contains exclusively Open Source components released under OSI approved licenses

Third parts technologies

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PeaZip acts as graphic frontend for multiple "engines" performing archiving, compression, encryption and volume split features
  • Pea (Giorgio Tani, LGPLv3) archiving utility featuring authenticated encryption; both PeaZip and Pea uses Wolfgang Ehrhardt's Pascal/Delphi crypto libraryarchiver
  • 7zarchiver (Igor Pavlov, LGPL) and p7ziparchiver (Myspace, LGPL, the POSIX port of 7z for Unix systems), supporting most of the mainstream archiving and compression formats
  • ARCarchiver (Bulat Ziganshin, GPL) FreeARC archiver, featuring high compression and strong encryption
  • PAQ/LPAQ/ZPAQarchiver (Matt Mahoney and other contributors, GPL) various compression utilities, the current state of art for maximum compression ratio
  • QUADarchiver (Ilia Muraviev, LGPL) and BALZarchiver (Ilia Muraviev, public domain) compression utilities
  • UPXarchiver (Markus F.X.J. Oberhumer, László Molnár and John F. Reiser, GPL), compression utility for binaries, and Striparchiver form GNU binutils (GPL)
  • UNACEarchiver (Marcel Lemke, ACE Compression Software, royalty-free UNACEV2.DLL license) UNACEV2.DLL and UNACE for Linux (royalty-free UNACE for Linux license) extractor for ACE files.
Open source archiving and compression utilities are included in the program’s package and ready to use; all software included in the package is released under OSI approved licenses. UNACE is available as separate downloadable plugin since, while royalty free, it's not released under an OSI-approved open source license.
Self-extracting archives are supported, built using 7-Zip's sfx modules (with custom icons and compressed with UPX in order to minimize the overhead added to the archive) and alternatively FreeArc's sfx modules. Custom third parts modules distributors are linked in Add-ons page.

PeaZip free archiver
PeaZip on Windows

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PeaZip on Linux

Project's goals

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  1. PEA - Pack Encrypt Authenticate
    • The initial goal of the application was creating a frontend for Pea archiver utility, implementing PEA archive format, designed ground up by myself to primarily focus on security and integrity: I wanted something performing strong authenticated encryption and perform integrity checks on both input objects and output volume(s). Pea offer those characteristics, and is open source (LGPL) freeware; file format specifications are released under public domain. I did a bit of cryptanalisys of it (see Documentation package); I hope more authoritative people may analyze it further.
    • Most archivers offer strong encryption, but bounded to password-only auhentication: Pea executable offers two factor authentication to increase encryption's security margins against password-related threats, like social engineering, dictionary attacks, bruteforcing, keylogging...
  2. Bring focus on Lazarus/FreePascal
    • I'm developing PeaZip project in FreePascal language, under Lazarus IDE. I like Pascal-related languages and I think Lazarus/FreePascal is one of the best cross-platform IDE available; I like it even more because it is open source and because it's growing day by day in a more mature and powerful IDE. I'll be glad to bring a bit of developer's attention on Lazarus/FreePascal through my project.
  3. Archiving and compression
    • Designing PeaZip UI, I'm aiming to focus on archive-specific tools, operations and needs rather than focusing on offering a faithful emulation of a file browser, like many mainstream archivers does. Saving lists of objects to be archived, saving archiving/extraction job definitions and receiving detailed job log after operations are primary goals of PeaZip UI. However, PeaZip's system integration, if desired, allows the user to perform most common operations (add to archive, extract here, encrypt, split file etc) without even care of the main program UI.
    • 7-Zip: thanking Igor Pavlov and Myspace choice of offering 7z under LGPL I was able to easily add support to many mainstream archive and compression formats to PeaZip, transforming it from a niche project (formerly named Pea-Peach) to a possibly wider targeted software. I hope I can turn back to them part of the benefit supporting .7z archive format, especially on Linux systems, offering a ready to use solution to extract and archive in .7z format among others.
    • ARC: a new, very promising archive format, featuring powerful but efficient compression, strong encryption and recovery records.
    • PAQ/LPAQ/ZPAQ: one of the most promising research project in the field of maximum compression is Matt Mahoney's Paq. Many different implementation and branches exists, as command line binaries and or integrated in archivers with GUI (like WinRK, WinUDA, KGB Archiver etc). PeaZip act as GUI fronted to various *Paq, hoping to contribute to the diffusion of this high compression format and in bringing focus on this interesting research project.
    • QUAD/BALZ: Ilia Muraviev's QUAD and BALZ are very promising ROLZ-based compression software featuring high compression ratio and fast decompression, making them very well suited in scenarios were decompression occurs more often than compression (i.e. package release).
    • Strip/UPX: I often use Strip/UPX on executables I compile (including PeaZip's ones); the GUI frontend for Strip/UPX in PeaZip comes to be very handy for me and I hope it can be an useful plus for many other developers to reduce executables size.
    • Two factor authentication: from version 2.1 PeaZip can use keyfiles for any supported format featuring encryption. The SHA256 hash of the keyfile (no size limit) is encoded in Base64 (RFC 4648) and prepended to the password. So, it is possible to work on archives encrypted in that way using PeaZip or any application following the same convention, or simply entering the Base64-encoded hash as the first part of the password.

Notes for users

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UTF-8 support
From version 2.2 UTF-8 character encoding is supported, allowing to properly handle extended characters in filenames and to deploy localization of PeaZip's user interface text in any language.
It should be noted however that, at present level of development of Lazarus/FreePascal project, most of the underlying FreePascal file-handling routines are still ANSI-only, meaning the UTF-8 strings PeaZip uses internally still have to be translated to ANSI strings to be passed to some functions.
As PeaZip aims 1) to stay cross-platform and 2) to bridge the gap between GUI and console worlds, allowing to easily export jobs as command lines, UTF-8 support is utterly complicated because each system / desktop environment / widgetset PeaZip is ported to has different levels and ways of supporting UTF-8 encoding for different APIs, for system pipes, for command line interpreters etc.
This issue currently causes:
  • PeaZip cannot browse files/dirs containing characters which are not featured in host system’s character’s set (they will be replaced by ? wildcard) due to the need of ANSI translation for strings passed to some FPC routines;
  • decoding of names of archived objects containing extended characters, form version 3.0.1, is supported for file types handled using 7z/p7zip backend (using backend's -sccUTF-8 option). However in some cases, due to the archive format specifications, or to issues of the software used to create the archive being examined, or due to charset conversion problems between the source system and the target system that is reading the archive, the conversion of character in filenames inside the archive may fail anyway. Optionally extended characters can be set to be always replaced by jolly "?" character to avoid possible issues between archive's and system's character encodings on some special cases.
In any case the ability of operate (test, create, extract etc) on the whole archive (as long as the file name can be passed to the application) is not affected by this issue

Custom drag and drop (Windows)
From version 2.1 it is possible to drag items from application to system (Windows version).
PeaZip uses a custom drag&drop to system feature that doesn’t need to copy files being dragged to system’s temp folder before, resulting in faster operation when big files are involved, and in better security if temp folder has not the same desired security policies of actual output folder.
This custom drag and drop function will not show default Windows drag and drop cursors and it can drag files to the path of (file)Explorer windows with Address field enabled (as it is by default on all Windows versions), or to the desktop; it will prompt a directory selection dialog if the path is not recognized i.e. content is dropped to an application other than (file)Explorer.

PEA archive type limitations
Such a list can be all but complete, however: when I designed PEA archive format I was less experienced and I basically didn't take in account the need to browse the archive or to partially extract objects; just to create and extract it.
Since filenames are, by design, saved along file streams, there is not an easy way to accomplish it without parsing the entire archive (which can be a reasonable solution only for small archives) or without changing format specifications breaking the compatibility with former versions.
A workaround I may implement in future to allow archive browsing could be creating an extra text filecontaining filenames, saved as first archive's object; that will not introduce backward incompatibility since previos PEA version could still correctly handle the new archives (just having the list-file as extra content) and will be quite painless introducing negligible space and speed payload, unless archiving many small files.
This is just an hypothetical evaluation and there still is not a roadmap about it. Anyway this is a PEA format related issue has no impact on users using PeaZip to handle formats other than PEA.


You can find a stub of cryptoanalisys of PEA archive format on PEA online help (.pdf)

Notes for translators

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Language files are UTF-8 encoded text files which can be edited using any suitable text editor.
To create a new translation file you can:
1 - copy default.txt (in PeaZip's path in /res/lang subfolder) or any other language file, if you prefer starting from another language, to a new file;
2 - edit lines 2 to 6 of the document to enter language name (both in English and in the original language for better readability), PeaZip's version (major.minor) the translation is aimed to, translator's and last last revisor's name and last revision date; IMPORTANT: revision number must not be specified alongside major.minor release number in 3rd line of language files since revisions shares the same text and are meant to deploy between-releases updates, ie.e for bugfixing or for packaging additional translations or resources.
3 - translate the text after the "variable_name: " part in "=== PeaZip text group ===" AND "=== PeaLauncher text group ===" sections of the file (don't move or remove lines, don't change the "variable_name: " part);
4 - optionally, translate the mini-tutorial after "=== about text group ===" line (free editing, it is loaded and displayed "as is" as application's mini-tutorial); it is very important to improve usability of the program for non-English speaking users.

In "PeaZip translations" download page, there is a package named containing a spreadsheet file to help in creating and maintaining localizations, simply compiling column D of the spreadsheet.
IMPORTANT: the spreadsheet contains 3 pages, "PeaZip text group", "PeaLauncher text group", and "About text group": all pages need to be completed and pasted (column E, for first two pages) in the language file; the "About text group" can be freely edited.
The spreadsheet shows variable name (column B), corresponding text string in english (column C) and a blank, yellow column (D) for typing the translated text strings.
On the right, a column E (blue) will show the "variable_name: " part assembled with the translated string: the content of this area can be copied and paste to replace the text in "=== PeaZip text group ===" and "=== PeaLauncher text group ===" sections (the spreadsheet features TWO pages, one for each of the two groups).
Lines must be pasted in the original order (it is sufficient to sort them by column F).

After column F are featured all currently available translations, in order to help translators more proficient in other languages than Englis, and to help to spot out what localizations need to be updated.
At each version all language files are mass-updated, with missing text lines in English; to update a localization, it's enough to update the English text lines.
For a better result it is also recommended to check all the language file to see if the update is coherent with linguistic style used by the translator of the current version.
For languages spoken in different ways in different countries (i.e. English, Spanish, Portuguese...) it is recommended to fork the translation, creating i.e. en-us, pt-br etc
PeaZip can load out of order (not optimal for performances) language files for older or newer versions.

Translated language files can be sent to me using the address (don't forget to remove the _removethis_ part), to be evaluated for inclusion in future updates and publication on peazip-translations
All translated language files should be considered as released under GFDL, GNU Free Documentation License, as they have to be considered derivate work from the application's language file which is released under GFDL.
Default language file is default.txt

Notes for developers

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PeaZip sources are contained in the peazip-* package.
PeaZip and PeaZip_portable shares the same sources being PeaZip installable basically the same portable application packaged into an installable format: Inno Setup's .exe for Windows, DEB, RPM and TGZ for Linux.

Compilation, build and porting
PeaZip, Pea and PeaLauncher are written in FreePascal (highly compatible with Delphi and ObjectPascal languages) and require Lazarus IDEarchiver to be compiled; Windows setup scripts (.iss files) are developed using Inno Setup.
To compile PeaZip binaries open the .lpi file of the desired binary (i.e. peach.lpi for peazip binary) and select "build all".
FreePascal supports multiple widgetsets (Win32, WinCE, GTK1, GTK2, Qt, Carbon, fpGUI) to allow compilation of GUI applications for the various supported systems and to create different “flavours” of the application for platforms supporting multiple widgetsets (i.e Linux).
PeaZip's sourcecode is cross platform, platform-specific code portions are contained in conditional compilations blocks.
Deploying the application to other targets than MSWINDOWS and LINUX may require adaptation of those platform specific areas (and possibly other fine-tunings); PC-BSD users successfully built PeaZip on *BSD platform.
PeaZip will also need various backend compression and archiving applications to be reachable in expected directories within the application's path, please refer to the structure of any of the precompiled packages, either installable or portable, to see what third parts binaries must be included, and refer to respective Authors for ports of those utilities; also read the help file readme.txt in the source's package for more hints.
Being PeaZip programmed as frontend/backend application, missing or unwanted backend binaries can be omitted, at the cost of losing the ability of handling supported formats; for the same reason, backend binaries can be freely replaced with 64 bit counterparts or with updated versions (which will work fine as long as they follow the same syntax).
PeaZip code should be fairly easy to port on Delphi and other Pascal dialects; the underlying crypto libraryarchiver, developed and maintained by Wolfgang Ehrhardt, is explicitly written to be portable to most or all Pascal dialects, however due to some ASM parts some of its features may be x86 processor specific.
Some units of the crypto library uses ASM sections not fully compatible with 64 bit Lazarus/FPC compiler, but the library provides also pure Pascal replacement for those units in order to allow compilation in those environments.

PeaZip free archiver should run on all Windows and Linux systems, in case of problems please refer to information in Hints sections on Windows, Portable and Linux download pages.
The program is tested on:
  • Windows 98SE;
  • Windows 2000; Windows XP
  • Windows Vista; Windows 7 32 and 64 bit
  • various x86 and x86-64 Linux distributions with GTK2 or Qt, both for Gnome and KDE
PEA archive support in third parts software
To support Pea file format in your applications you may follow one of those ways:
  • use directly the executable Pea archiving utility (LGPL freeware) passing parameters through command line, as in PeaZip;
  • use Pea sourcecode as library to call Pea-related functions from your code (as in the demo application in "sources" package);
  • create a new implementation following the file format specifications, which are released under public domain and, as for what is known to the author, are free and unencumbered for any use.

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