zpaq icon
zpaq icon

zpaq

zpaq is a free and open source incremental, journaling command-line archiver for Windows, Linux and Mac OS/X.

Archive size vs. time to compress and extract 10 GB (79,431 files) to an external USB hard drive at default and maximum settings on a Dell Latitude E6510 laptop (Core i7 M620, 2+2 hyperthreads, 2.66 GHz, 4 GB, Ubuntu Linux, Wine 1.6).

Cost / License

Application type

Alerts

  • Discontinued

Platforms

  • Windows
  • Linux  PPA - [https://launchpad.net/~abbat/+archive/ubuntu/zpaq-upstream](https://launchpad.net/~abbat/+archive/ubuntu/zpaq-upstream)
  • Mac
zpaq alternatives  
Discontinued

Last update was in 2016, but it can still be downloaded from their website.

9likes
35alternatives
0articles

Features

Properties

  1.  Privacy focused
  2.  Lightweight

Features

  1.  Incremental Backup
  2.  File Versioning
  3.  Ad-free
  4.  AES-256 Encryption
  5.  Works Offline
  6.  Portable
  7.  Command line interface
  8.  Encrypted Backup
  9.  No registration required
  10.  No Tracking
  11.  File Compression
  12.  File Archiving
  13.  Data deduplication

 Tags

zpaq News & Activities

Highlights All activities

Recent activities

  • ZIP Protect icon
    POX added zpaq as alternative to ZIP Protect
  • Kopia icon
    Xprt25 added zpaq as alternative to Kopia
  • Xprt25 updated zpaq
  • Restic icon
    Xprt25 added zpaq as alternative to Restic
  • Xprt25 liked zpaq

zpaq information

Our users have written 2 comments and reviews about zpaq, and it has gotten 9 likes

zpaq was added to AlternativeTo by matchlight on and this page was last updated .

Comments and Reviews

   
Top Positive Comment
ph soft
0

Excellent for incremental backups of large text files or folders. High compression ratio and fast for small changes. Can be used for versioning/snapshots (development). Another developer has forked it with some additional featured (franz zpaq). No real alternative found.

superstickynotemealt
0

No good GUI are available sadly. Bandizip is the best UI for extracting files, but it's ad supported or $30 per user. That major con aside Zpaq is simply amazing. It's fast, compact, and resilient.

The #1 reason to sue ZPAQ is that you want to keep lots of iterations/revisions of the same file in case you want to restore to an earlier version.

I have over 500GB of backups compressed into 5GB space and it only takes a couple moments to add new files or extract something when I need it.

The only other compressor that works this well for my files is ARC, but it is crazy slow, and time consuming to extract compared to ZPAQ.

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What is zpaq?

zpaq is a free and open source incremental, journaling command-line archiver for Windows, Linux and Mac OS/X. Documentation can be found at: http://mattmahoney.net/dc/zpaqdoc.html

The ZPAQ archive format is described by a specification - http://mattmahoney.net/dc/zpaq206.pdf. The compression algorithm is described here - http://mattmahoney.net/dc/zpaq_compression.pdf.

The source code includes the libzpaq API providing compression and decompression services for applications in C++. Developers may be interested in the zpaqd development tool and sample configuration files found on the utilities page - http://mattmahoney.net/dc/zpaqutil.html.

zpaq is written by Matt Mahoney and released to the public domain. It includes code from libdivsufsort 2.0 (C) Yuta Mori, 2003-2008, MIT license, public domain code for AES from libtomcrypt by Tom St Denis and public domain code for salsa20 by D. J. Bernstein.

When compression ratio is important. ZPAQ is based on the top ranked PAQ context mixing algorithm.

zpaq.exe is a ZPAQ compatible multithreaded compressor and decompresser with 4 compression levels. The latest version can be found at http://mattmahoney.net/dc/zpaq.html

For quick help, run zpaq with no arguments. For detailed usage, see zpaq.cpp.