Official releases and interim builds of the NuGet packages for the Open XML SDK project.


Release Version 2.7

The Open XML SDK provides open-source libraries for working with Open XML Documents (DOCX, XLSX, and PPTX). It supports scenarios such as:

  • High-performance generation of word-processing documents, spreadsheets, and presentations.
  • Populating content in DOCX files from an XML data source.
  • Splitting up (shredding) a DOCX or PPTX file into multiple files, and combining multiple DOCX / PPTX files into a single file.
  • High fidelity conversion of DOCX => HTML/CSS and HTML/CSS => DOCX.
  • Extraction of data from XLSX.
  • Searching and replacing content in DOCX / PPTX using regular expressions.
  • Updating cached data and embedded spreadsheets for charts in DOCX / PPTX.
  • Document modification, such as removing tracked revisions or removing unacceptable content from documents.

Open-Xml-PowerTools provides example code and guidance for implementing many of the above important Open XML scenarios. Be sure to check it out before re-inventing your own solutions.

Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

Portions of this project are licensed under the MIT license. See MIT-License.txt in the project root for license information.

The Latest Builds

Where to get the NuGet package?

The NuGet package for Open XML SDK is currently available as a custom feed on MyGet. You can trust this package source, since the custom feed is locked and only this project feeds into the source.

How to install the NuGet package?

The package you want to install is DocumentFormat.OpenXml. See

The Install-Package command considers the package source either via configuration or argument. Also the package version can vary. For the latest version info, see

  • To specify the package source via a configuration option, see Note that usually a NuGet.config file is placed in the directory and the configuration options are added there to ensure the sources are persisted in the version control.

      PM> Install-Package DocumentFormat.OpenXml -Version <version retrieved from the web>
  • To pass the feed URL as an argument, here is an example for Visual Studio 2015 and later.

      PM> Install-Package DocumentFormat.OpenXml -Version <version retrieved from the web> -Source 

Note: If you have trouble installing the package, try restarting Visual Studio. Package sources could be cached, and changes you've made to any NuGet.config files may not be detected.

Change Log

Version 2.7.1 : January 31, 2017

  • Fixed crash when validation is invoked on .NET Framework with strong-naming enforced

Version 2.7.0 : January 24, 2017

  • Added support for .NET Standard 1.3
  • Moved to using System.IO.Packaging from dotnet/corefx for .NET Standard 1.3 and WindowsBase for .NET 4.5
  • Cleaned up project build system to use .NET CLI

Version 2.6.1 : January 15, 2016

  • Added hundreds of XUnit tests. There are now a total of 1333 tests. They take about 20 minutes to run, so be patient.

Version 2.6.0 : June 29, 2015


The functionality of the specific classes in Open XML SDK Version 2.7.0 is similar to version 2.5, therefore the documentation available on MSDN is still accurate.

Open XML SDK 2.5 for Office

In addition to open sourcing of the SDK, Microsoft has opened up the conceptual documentation for public review / contributions. A copy of the documentation is now in GitHub for you to edit and review.


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By: Taylor Southwick

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