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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.

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FAQ / COMMON ARCHIVE FORMATS > GZ FILE FORMAT
open source rar

GZ file format, GZip compression algorithm



WHAT IS GZ FILE FORMAT

GZ file extension



GZ extension designates a single file compression format, created for GZip (GNU Zip or gratis Zip) project in 1992 by Jean-Loup Gailly and Mark Adler.
Compression is based on DEFLATE algorithm (also used as default algorithm in PKZip/WinZip's .ZIP format), a combination of Lempel-Ziv coding (LZ77) and Huffman coding.

7-Zip (and PeaZip, which handles zip and gzip files through Open Source 7-Zip / p7Zip binary backend) use an custom optimized DEFLATE implementation producing better compression ratios than standard reference DEFLATE implementation, keeping full compatibility with other compression utilities working on .gzip files, but using more processor time (gzip compression and extraction is however very fast, and CPU/RAM-light, for today's machines capabilities).

PeaZip has full support for GZip standard, including compression, listing, testing, and extraction. Read also: how to create and open GZ files

TAR.GZ specifications

When it is recommended to use GZ format: GZip is usually employed for compressing TAR packages on Linux and other Unix-like systems.

gzip files


Gzip's GZ file format lacks file archiving feature - it can compress each single file, but cannot consolidate multiple input file in a single (compressed) container archive - for that reason it is commonly used on Unix/Linux world to compress TAR archives (as well as BZip2, lzma / XZ,...) - archiving format which can consolidate multiple files in a single package and preserve filesystem information (file attributes, date/time etc), but lacks compression capabilities - producing TGZ file (if single file extension convention is used) or TAR.GZ file (if multiple file extension convention is used).

Read more on GZipGzip software program and GZ file type on GnuZip official domain.

  



  

.GZ

Authors: Jean-Loup Gailly, Mark Adler, 1992

SPEED gz file extraction

Very high, due fast and lightweight compression algorithm, not encumbered by extra features.







COMPRESSION RATIO gzip algorithm

Classic Deflate file compressor, comparable to ZIP and PEA, but inferior to BZip2 or modern compressors as 7Z and RAR format.

ADVANCED OPTIONS decompress GZ format
GZip standard is meant only to provide single file compression, other features including archival are out of its scope.








RELATED & SIMILAR PAGES
CREATE GZ FILE

DOUBLE FILE EXTENSION

SOLID COMPRESSION ADVANTAGES
TAR.GZ / TGZ FILES
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