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Xceed Zip for .NET: zip .net, unzip .net, compress, uncompress, file system, aes, encryption, info-zip, zlib, deflate64, password, dotnet, .net 2.0, .net 3.0


The most powerful and flexible zip / unzip component on the market. An 18-year track record!
Current version for .NET 4.5 / 4: 5.5 (History)
Current version for .NET 3.5 SP1 & lower: 4.7
Platform: .NET
Price: $799.95 USD for product + 1 year subscription
          Perpetual, royalty-free license
          45-day trial, 60-day satisfaction guarantee

Xceed Zip for .NET Updates : info-zip, zlib, deflate64, password, dotnet, .net 2.0, .net 3.0, zip .net, unzip .net, compress, uncompress, file system, aes, encryption

Version 5.5
May 12, 2014

  • All .NET controls in Data Manipulation Suite based on Xceed FileSystem classes move to v5.5 and include bug fixes and minor improvements.
  • Get the latest build now.
  • [The corresponding .NET 2.0/3.5 build is v4.7]
Version 5.4
Released Nov. 27, 2013
Updated Feb. 12, 2014 
  • New LZMA compression implementation, bug fixes, new event for post-processing items, new method to write contents of a MemoryFile to a byte array.
  • Get the latest build now.
  • [The corresponding .NET 2.0/3.5 build is v4.6]

    Update 5.4.14105.13160 released Feb. 12, 2014. (Bug fix update.) 
Version 5.3
  • Bug fixes and version number synchronization.
  • Get build 5.3.13060.11000 now.
  • [The corresponding .NET 2.0/3.5 build is v4.5]

    Update 5.3.13163.12170 released March 25, 2013. (Documentation now compatible with Visual Studio 2012.)

    Update 5.3.13327.09020 released July 8, 2013.
Version 5.2
  • Recompilation and version number synchronization due to the release of Xceed SFTP for .NET.
  • Get build 5.2.12555.15590 now.
  • [The corresponding .NET 2.0/3.5 build is v4.4]
Version 5.1
  • Xceed Zip for .NET v5.1 now creates zip files even more efficiently by allowing developers to decided whether folder entries should be written to an archive, which reduces its size. The product can also create archives using the Deflate format without compression, for full compatibily with Xceed Real-Time Zip (.NET / .NET CF / Silverlight) and generally improved flexibility.
  • [The corresponding .NET 2.0/3.5 build is v4.3]
  • Note: As of February 2012, Xceed Zip for .NET with Self-Extractor has been discontinued and the self-extracting module is now included with Xceed Zip for .NET.

    Update 5.1.11215.08200 released April 19, 2011. (Adds 64-bit environment support for PPMd and ability to choose the AES encryption algorithm used.)

    Update 5.1.11426.13350 released August 29, 2011.

    Update 5.1.11480.15010 released October 5, 2011.

    Update 5.1.11524.15300 released October 31, 2011. (Contains documentation updates.)

    Update 5.1.12125.10470 released March 1, 2012.
    (Changes in documentation and new license agreement.)

    Update 5.1.12266.12120 released May 22, 2012.

    Tested with and fully compatible with Visual Studio 2012, .NET 4.5, and Windows 8.
Version 5.0
  • This version is built and fully compatible with .NET Framework 4 for Visual Studio 2010.

    Update 5.0.10308.13200 released June 11, 2010.

    Update 5.0.10371.14080 released July 26, 2010.

    Update 5.0.10417.17090 released August 23, 2010.
Version 4.2
  • The Zip capabilities in version 4.2 of Xceed Zip for .NET boast their most exciting and significant performance increase yet. Creating and updating zip files can be significantly faster, thanks to a greatly reduced use of temporary files. 
  • Added a TarEvents class (currently undocumented). The class should be used like the ZipEvents class. For now, TarEvents only contains the ReadingTarItemProgression event. It will be triggered during the initial reading of the Tar archive. The Tar format does not allow the component to know the total number of items without a large time penalty. So true progression with a percentage is not possible. The event will report the value 0 in the 'Total' property until the last time the event is triggered. Then, the value in 'Total' will be the total number of items read. This will also serve to indicate that the operation has completed.

    Update 4.2.10308.15040 released June 11, 2010.

    Update 4.2.10371.14390 released July 26, 2010.

    Update 4.2.10417.22220 released August 23, 2010.
Version 4.1
  • Version 4.1 incorporates the latest Zip and compression standards by supporting the LZMA algorithm, used by WinZip 12. UTF-8 character encoding in headers is also provided for improved multilingual support. These enhancements will ensure that developers can respond quickly to changes in the industry and keep a step ahead of their competition.

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.

    Update 4.1.9417.12000 released August 31, 2009.

    Update 4.1.9460.14460 released September 11, 2009.

    Update 4.1.9616.13400 released December 21, 2009.

    Update 4.1.10159.13000 released March 11, 2010.
Version 4.0
  • The product’s included FTP capabilities feature enhancements that greatly improve its ability to connect to a server residing behind a firewall. Internal architecture changes improve performance and transfer capabilities. Finally, various enumerations have been modified to match those found in the .NET Framework.

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.

    Update 4.0.9175.12420 released April 1, 2009.

    Update 4.0.9356.09250 released July 13, 2009.
Version 3.7
  • Service release. Full compatibility with Visual Studio 2008. All samples have been converted to VS2008 (names of Visual Studio 2005 versions now contain "_VS2005").

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.

    Update 3.7.8312.09580 released June 12, 2008.

    Update 3.7.8373.08220 released July 28, 2008.

    Update 3.7.8465.14130 released September 16, 2008.

    Update 3.7.8577.11540 released December 1, 2008.
Version 3.6
  • Self-extracting Zip file capabilities now only available in Xceed Zip for .NET with Self-Extractor. Existing users of Xceed Zip for .NET with a Vanguard subscription are entitled to continue using the existing as well as the new Self-Extractor capabilities.

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.
Version 3.5
  • Added the PPMd compression method for improved compatibility with the latest version of WinZip and for producing the most compressed output possible, especially with text and XML files.

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.
Version 3.4
  • Added BZip2 compression method for improved compatibility with the latest WinZip and greater compression, and BWT compression method for superior compression.

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.
Version 3.3
  • Flexible synchronization of any number of folders and files of any type, wherever they are located. Three new “Quick” classes: QuickFtp, QuickTar, and QuickGZip.

    As of v3.3, Xceed Zip for .NET works only with .NET Framework 2.0 and up. Users developing with .NET 1.1 can obtain the latest bug fixes by downloading the latest Service Pack.
Version 3.2
  • Support for HTTP proxy servers added for increased compatibility with network environments and SSL support extended to the FileSystem interface, via FTP for .NET.

    This is the last version of Xceed Zip for .NET compiled to run on both .NET Framework 1.1 and 2.0. While no new features will be made available for developers working with .NET 1.1, bug fixes for versions designed to work with .NET 1.1 will continue to be made available through Service Packs.
Version 3.1
  • Support for industry-standard AES (Advanced Encryption Standard) has been added, letting you use the strongest security available on the market with your Zip files. Compatible with WinZip 9 and 10.
Version 3.0
  • Support for reading and writing Tar archives and GZipped files has been added, ensuring maximum compatibility between your applications and the data they need to work with.
Version 2.3
  • The ability to read and write in the Zip64 zip file format has been added. Gone is the 4 GB limit for files and archives, and archives can hold an almost unlimited number of files.
Version 2.2
  • Version 2.2 supports extra headers, meaning that supplementary information (in both PKWARE and Info-Zip formats) can be included in zipped files. End-users can therefore use detailed time-stamp information (last modified, last accessed, and creation date and time) and Unicode filenames (international characters).
Version 2.1
  • Increased performance. The result is that when compressing a large number of files, speed improvements in the range of 40% to 80% have been obtained. When decompressing files, the improvement is between 20% and 30%.
Version 2.0
  • Splitting and spanning: Supports reading, writing and even updating zip files that are split into multiple parts (with different filenames, like .Z01, .Z02, etc.) or that span multiple disks (with the same filename on each disk). In addition, split zip files can be located in the same folder or in altogether separate locations.
  • Full self-extracting support: Sharp, fully customized self-extracting zip files can be created. In fact, it supports all the features offered by our extremely feature-rich Xceed Self-Extractor Module, but without the added cost of an extra module to purchase.
  • With Self-extracting, you can dynamically create self-extracting zip files with install-program-strength capabilities like displaying an intro message or license agreement, showing a progress dialog, asking for passwords, running another application, creating program groups, opening documents, etc.
  • Deflate64: The Deflate64TM algorithm is now supported.
  • Updated filesystem object model: With its new memory and .NET isolated storage file and folder objects, all zip, unzip, copy, move, rename and other operations can now be performed to and from memory and .NET isolated storage, not only to disk and zip files and folders.
  • This also means that you can not only zip from memory, but you can also create a zip file entirely in memory then access, modify or copy it or its contents as if it was a real file. Also, in addition to being able to unzip from a file to memory, you unzip from a zip file that is in memory or in a stream.