zipx file format
WinZip zipx format
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Open and extract over 180 archive types: ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more...
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zipx specs
FAQ / COMMON ARCHIVE FORMATS > ZIPX FILE FORMAT
zipx format features

ZIPX file format (WinZip)



WHAT IS ZIPX FILE FORMAT

zipx extension



ZIPX file extension designates a compressed archive format developed by WinZip team, starting from WinZip 12.1 (released as trialware program on 13 September 2008) as alternative to classic PKZip's ZIP format standard.

WinZip's ZIPX standard is based on ZIP specifications with introduction of newer data compression algorithms - LZMA, PPMd and others (superseding classic Deflate, Deflate64, and BZip2 algorithms) - and employing custom pre-compression filters (WavPack and JPEG filter) to improve compression of images and other media data structures.
This results in zipx format providing higher compression ratio than classic zip format (but at cost of higher computational cost), comparable with compression ratio of formats like RAR, ACE, and in some cases 7-Zip's 7Z/XZ files.
Also, ZIPX files supports new AES-based WinZip's AE encryption (128 bit and 256 bit) - and optionally, for legacy support only, old ZipCrypto (Zip 2.0) cryptography.
Like for ZIP files, WinZip provides its custom file spanning scheme for splitting ZIPX archives.
File extension modification from zip to zipx was intended to avoid ambiguity with users (openly marking it as new type, with new extension) and prevent older archivers to try to handle the new zipx standard as it was a classic zip file, failing to support its newer features.

PeaZip can open and extract ZIPX files, but the support is read-only, meaning the application cannot create / update zipx files.
Custom pre-compression filters are currently unsupported.

On data compression benchmark page you can compare how .zpix format fares, in terms of compression ration and compression / extraction computation speed, with mainstream formats such as .7z, .rar, and .zip, testing various software implementations (PeaZip, WinRar, WinZip).

External online resources: ZIPXzipx file format Wikipedia page, WinZip.zipx type Knowledge Base entry for ZIPX standard.

  



  

.ZIPX

WinZip team, 2008

SPEED zip vs zipx

Average: using PPMd or LZMA compression algorithms rather than Deflate, speed is comparable with WinRar' RAR or 7-Zip's 7Z rather than with classic ZIP compression.







COMPRESSION RATIO rar vs zipx

Very good: PPMd, and LZMA algorithms (and use of WavPack and JPEG pre-compression filters) provides compression ratio comparable to RAR and 7Z formats.

ADVANCED OPTIONS zipx file encryption

Good, designed to employ AES-based WinZip AE encryption.
Lacks recovery records option available for RAR format.








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