freeware rar utility
Free rar software
   DOWNLOAD PEAZIP FREE RAR AND ZIP UTILITY
ONLINE SUPPORT SOFTWARE'S FAQ
LEARN MORE
rar free
free rar software free rar utility
portable rar rar freeware free rar
free rar tool

free rar files utility

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...
Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP files
Open and extract over 180 archive types: ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files 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.

free rar software

free rar
FAQ / COMMON ARCHIVE FORMATS > 7Z FILE FORMAT
open source rar

7Z file format (7-Zip archives)



WHAT IS 7Z FILE FORMAT

7Z FILES, READ MORE

7z file format specifications



7Z archiving format was created for 7-Zip, a popular modern file archiver application written by Igor Pavlov, and released as freeware and Open Source software. 7-Zip (often incorrectly shortened in 7zip) was developed for Microsoft Windows platforms, and ported by p7zip (POSIX-7Zip) project team on Unix platforms.

7Z is capable of very high compression ratio through powerful compression algorithms (LZMA/LZMA2, PPMd, BZip2, optionally optimized Deflate), at cost of more memory and CPU intensive compression process - that however can take benefit of parallel computing on modern multicore CPUs.
On average test cases 7Z format improves compression ratio 30-70% better over classic ZIP format, and 6-7% better than RAR files (WinRar's native format, proprietary). 7Z compression compares favourably also with new WinZip's ZIPX format in most cases.
7Z format also provides native UTF-8 support for filenames, Rijndael/AES encryption, and volume spanning.

When is 7Z format recommended

in brief, .7z is a good choice anytime it is important to attain a superior compression ratio, and it is welcome the support for strong encyption to keep archived data private.

XZ extension identify a pure compression format (compresses a single file, without offering option of archiving multiple input file into a single output .xz file), it is based on LZMA/LZMA2 algorithm family, providing the usual 7z-like compression ratio (similar or higher compared to RAR), recently often used on TAR files.

PeaZip supports creation and extraction of 7z files: create, open, browse, and extract 7Z archives, convert any supported archive to 7z format and vice-versa.

  



  

.7Z

Author Igor Pavlov, 1999

SPEED 7z archives

Average. Computing intensive compression algorithms are balanced by efficient parallel programming implementation.







COMPRESSION RATIO 7z compression ratio

Very good. Comparable, often better than RAR compression, but inferior to state of art PAQ compressor.

ADVANCED OPTIONS 7z
Good. Native support for AES encryption and UTF-8 encoding. Lacks recovery records option available for RAR format.






7Z files, read more


External online resources: 7-Zip official domain7zip software domain, p7zip projectp7zip POSIX port of 7-Zip for Unix and Unix-like operating systems, 7Z file format specifications7zip specifications, 7Z format Wikipedia entry7zip archive format, PPMdWikipedia prediction by partial matching and LZMA/LZMA2Lempel Ziv Markov chain algorithm data compression algorithms.

Topics and search suggestions: what is .7z file extension, LZMA compression, 7z file type wiki, tar.xz, XZ compressed files, 7-zip archive format specs, native 7zip archives, 7Z file format specifications.



RELATED & SIMILAR PAGES
7Z FILE EXTRACTION

BACKUP SOFTWARE

EXTRACT 7-ZIP FILES
EXTRACT ACE FILES

EXTRACT ARC FILES
 
EXTRACT BZ2 FILES

EXTRACT CAB FILES

EXTRACT GZ FILES

EXTRACT ISO FILES

EXTRACT RAR FILES

EXTRACT TAR

EXTRACT ZIP FILES

EXTRACT ZIPX FILES

HOW TO ENCRYPT FILE

IMPROVE FILE COMPRESSION

JOIN SPLIT FILES
 
MISSING PASSWORD

OPEN ENCRYPTED ARCHIVE

RAR FILE CONVERTER

PERMANENT ERASURE

VERIFY CHECKSUM
Tag Cloud
7-zip 7z files 7z compression ace files archive manager cab files create 7z archives extract 7z files extract rar extract tar extract zip files file compression find duplicate files free archiver free rar free zip handle 7-zip files open 7z files open iso image rar files secure delete split files zip files





download rar software
DOWNLOADS
free rar archiver
All PeaZip downloads
PeaZip for Windows 32 bit
PeaZip for Windows 64 bit
PeaZip Portable
PeaZip Linux/BSD
online rar program support
SUPPORT
how do i zip unzip files
Online help
Frequently Asked Questions
More information





open rar files
DONATE
rar files
Support PeaZip project, or donate to FAO, UNICEF and UNESCO from donation page

© PeaZip srl: TOS, Privacy
OSDN software repository
free rar downloads
SourceForge software repository
free rar
Releases Feed zipx files
PeaZip Wiki rar files
Developer email download rar software
Search knowledge-base
rar archiver