Rebex ZIP for .NET

ZIP, UnZIP, Deflate, ZLib, GZip compression library for .NET Framework.


  • Compatible with WinZip, PKZIP, Info-ZIP (and many others).
  • Easy to use API (see the tutorials).
  • Password protection (legacy ZIP 2.0 encryption method; WinZip compatible AES 128, AES 192, AES 256 encryption methods).
  • Protect existing ZIP file with password without the need of decompression of source ZIP file and temporary disk/memory space.
  • International characters in filenames (Unicode support).
  • Supports large files (over 4GB).
  • Multi-core compression support. The number of cores used for compression can be configured via ZipArchive.Options.CompressorCount property.
  • Wildcards support for adding, extracting and deleting files.
  • Advanced file filtering using the FileSet class.
  • Recursive directory tree operations.
  • Both stream and file based operations.
  • Possibility to access decompression stream directly.
  • Create ZIP files in memory.
  • Add data to ZIP file from stream or memory.
  • Written in 100% pure .NET.
  • Samples for command line, WinForms and ASP.NET.
  • All samples available in C# and VB.NET.
  • Add, extract, delete, move/rename files in ZIP archive.
  • Move capability makes it possible to delete source item after successful transfer.
  • 10 compression levels.
  • ZIP archive shrinking.
  • Events and delegates for effortless integration with your applications.
  • Component source code available (C#).
  • Deflate and Enhanced Deflate support (compatible with Deflate64(tm) by PKWARE).
  • Read/write comments within ZIP file.
  • Open self-extracting ZIP archives.
  • Thread-safe.
  • FIPS compliant mode in which only FIPS-approved modules are used.
  • Support for asynchronous operations including .NET 4.x-style task-based API.
  • Storing and restoring file dates and attributes (Read-only, Archive, Hidden and others).
  • Ability to inflate (decompress) directly to in-memory byte array.
  • Searching for files inside the archive by wildcard mask or FileSet (advanced file filter definition class).
  • Support for IEnumerable<T> in ZIP item collections (required for using LINQ).
  • All operations are done without any temporary files.
  • Archive contents listings with complete file details (original size, compressed size, creation and last modification dates, CRC checksum, comment).
  • Custom Deflate algorithm implementation - no dependency on any open-source ZLib compression libraries (unlike many others).
  • GZipCompression stream and GZipDecompression stream with multiple files support.
  • Zip.Options.RestoreDateTime property to make it possible to restore source date/time on target.
  • FileSet.Flatten option (makes it possible to ignore source directory structure and copy all files into single target directory).

Platform support

  • .NET Framework
    2.0, 3.0, 3.5. 4.0, 4.5.x, 4.6; both 32-bit and 64-bit editions on Windows XP or later; Visual Studio 2005, 2008, 2010, 2012, 2013, 2015
  • .NET Compact Framework
    2.0, 3.5, 3.9 on Windows Mobile, Windows CE, Pocket PC, PDAs and Smartphones, Windows Embedded Compact 2013; Visual Studio 2005, 2008, 2012, 2013
  • Mono
    2.10, 3.x, 4.x on Linux and Apple's OS X
  • Xamarin.iOS
    Xamarin.iOS 8.6 or later ; Xamarin Studio
  • Xamarin.Android
    Xamarin.Android 4 or later ; Xamarin Studio

Experimental support for various Windows Store Apps platforms including Windows 8 or later, Windows Phone 8.1 or later, Portable Class Libraries and Universal Windows Platform.

Licensing and support

  • Royalty free redistribution.
  • Includes 1 year support contract.
  • Includes all new versions released during 1 year.


WinForms samples

ASP.NET samples

Simple commandline utilities

  • ZIP Console Utility
    Simple command line ZIP archive manipulation utility.
  • Simple UnZIP
    Demonstrates how to extract all files from a ZIP archive.
  • Simple ZIP
    Demonstrates how to create a ZIP archive and add files to it.
  • ZIP Info
    Command line utility that displays information about a ZIP archive.

Xamarin.Android samples

Xamarin.iOS samples

Pocket PC and Windows CE Applications

What next?