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.gitignore New module HtmlToWmlConverter.cs, along with associated xunit tests, … Oct 1, 2015
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OpenXmlPowerTools.dll-Help.xml Provided help functionality for Out-Xlsx cmdlet Oct 24, 2015
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OpenXmlPowerToolsExamples.sln Initial release of WmlComparer module Jun 13, 2016 Initial release of WmlComparer module Jun 13, 2016


The Open XML PowerTools provides guidance and example code for programming with Open XML Documents (DOCX, XLSX, and PPTX). It is based on, and extends the functionality of the Open XML SDK.

It supports scenarios such as:

  • Splitting DOCX/PPTX files into multiple files.
  • Combining multiple DOCX/PPTX files into a single file.
  • Populating content in template DOCX files with data from XML.
  • High-fidelity conversion of DOCX to HTML/CSS.
  • High-fidelity conversion of HTML/CSS to DOCX.
  • Searching and replacing content in DOCX/PPTX using regular expressions.
  • Managing tracked-revisions, including detecting tracked revisions, and accepting tracked revisions.
  • Updating Charts in DOCX/PPTX files, including updating cached data, as well as the embedded XLSX.
  • Comparing two DOCX files, producing a DOCX with revision tracking markup, and enabling retrieving a list of revisions.
  • Retrieving metrics from DOCX files, including the hierarchy of styles used, the languages used, and the fonts used.
  • Writing XLSX files using far simpler code than directly writing the markup, including a streaming approach that enables writing XLSX files with millions of rows.
  • Extracting data (along with formatting) from spreadsheets.

Copyright (c) Microsoft Corporation 2012-2016 Portions Copyright (c) Eric White 2016 Licensed under the Microsoft Public License. See License.txt in the project root for license information.


We are happy to announce the release of the Open XML PowerTools Version 4.3. The big new feature in 4.3 is WmlComparer.cs, which is a module that compares two DOCX files and produces a DOCX with revision tracking markup. It enables retreiving a list of revisions.

Open-Xml-PowerTools Content

There is a lot of content about Open-Xml-PowerTools at the Open-Xml-PowerTools Resource Center at


Build Instructions

For this release, you need Visual Studio 2013 or 2015 installed. The following video shows gitting and building the Open-Xml-Sdk and Open-Xml-PowerTools using Visual Studio 2015 Community Edition, which is free.

If you are using Visual Studio 2013, make sure that you have Update 4 for Visual Studio 2013. Previous versions of Visual Studio 2013 do not work.

You can use Visual Studio 2012 to build the Open-Xml-Sdk and Open-Xml-PowerTools libraries and run the examples. The xUnit tests do not work with Visual Studio 2012.

The following video walks through the process building Open-Xml-PowerTools:

Installing, Building, and Running Open-Xml-PowerTools 4.0

In order to build Open-Xml-PowerTools 4.0 and later, you need to retrieve both the Open-Xml-Sdk and the Open-Xml-PowerTools repos from GitHub. The projects are set up expecting that the Open-Xml-Sdk repo and the Open-Xml-PowerTools repo are siblings to each other in the file system. The Open-Xml-PowerTools projects look for the Open-Xml-Sdk in a directory with that exact name (Open-Xml-Sdk).

If you want to use the Open-Xml-PowerTools Cmdlets, one easy way to do this is to put both the Open-Xml-Sdk and the Open-Xml-PowerTools repos in the ~/Documents/WindowsPowerShell/Modules directory. PowerShell by default looks for modules in this directory, so if we place these repos in this directory, after building the Open-Xml-Sdk, we can import the Open-Xml-PowerTools module and start using the Cmdlets. If the WindowsPowerShell/Modules directory doesn't exist, you can create it.

If you don't care about the Open-Xml-PowerTools Cmdlets, then you can put the two repos into any directory you like, so long as you make them siblings to each other.

The short form of the installation instructions are:

  • Make sure you are running PowerShell 3.0 or later
  • If necessary, set your execution policy. Run PowerShell as administrator and Set-ExecutionPolicy Unrestricted (or RemoteSigned)
  • cd ~/Documents/WindowsPowerShell/Modules
  • git clone
  • git clone
  • Using Visual Studio, open Open-Xml-Sdk/Open-XML-SDK.sln
  • Build the solution. To validate the build, open the Test Explorer (pick TEST -> Windows -> Test Explorer from the menu). Click Run All.
  • To start using the Open-Xml-PowerTools Cmdlets, in PowerShell, Import-Module Open-Xml-PowerTools
  • Using Visual Studio, open Open-Xml-PowerTools/OpenXmlPowerToolsExamples.sln
  • Build the solution. To validate the build, open the Test Explorer. Click Run All.
  • To run an example, set the example as the startup project, and press F5.

Change Log

Version 4.3 : June 13, 2016

  • New WmlComparer module

Version 4.2 : December 11, 2015

  • New SmlDataRetriever module
  • New SmlCellFormatter module

Version 4.1.3 : November 2, 2015

  • DocumentAssembler: Fix bug associated with duplicate bookmarks.
  • DocumentAssembler: Enable processing of content controls / metadata in footer rows.
  • DocumentAssembler: Avoid processing content controls used for purposes other than the DocumentAssembler template, including page numbers in footers, etc.

Version 4.1.2 : October 31, 2015

  • HtmlToWmlConverter: Handle unknown elements by recursively processing descendants

Version 4.1.1 : October 21, 2015

  • Fix to AddTypes.ps1 to compile WmlToHtmlConverter.cs instead of HtmlConverter.cs
  • Fix to MettricsGetter.ps1 to correctly report whether a document contains tracked revisions
  • Added some unit tests for PresentationBuilder

Version 4.1.0 : September 27, 2015

  • New HtmlToWmlConverter module
  • HtmlConverter generates non breaking spaces as #00a0 unicode charater, not   entity.

Version 4.0.0 : August 6, 2015

  • New DocumentAssember module
  • New SpreadsheetWriter module
  • New Cmdlet: Complete-DocxTemplateFromXml
  • Fix DocumentBuilder: deal with headers / footers more rationally
  • Enhance DocumentBuilder: add option to discard headers / footers from section (but keep layout of section)
  • Fix RevisionAccepter: deal with w:moveTo immediately before a table
  • New test document library in the TestFiles directory
  • XUnit tests
  • Cleaned up build system
  • Build using the open source Open-Xml-SDK and the new System.IO.Packaging by default
  • Back port to .NET 3.5
  • Rename the PowerShell module to Open-Xml-PowerTools

Version 3.1.11 : June 30, 2015

  • Updated projects and solutions to build with the open source Open XML SDK and new System.IO.Packaging

Version 3.1.10 : June 14, 2015

  • Changed Out-Xlsx Cmdlet to C# implementation
  • Fix Add-DocxText

Version 3.1.09 : April 20, 2015

  • Fix OpenXmlRegex: PowerPoint 2007 and xml:space issues, causing 2007 to not open PPTX's

Version 3.1.08 : March 13, 2015

  • Added Out-Xlsx Cmdlet

Version 3.1.07 : February 9, 2015

  • Added Merge-Pptx Cmdlet
  • Added New-Pptx Cmdlet
  • Added New-PmlDocument
  • Fixed help for Merge-Docx
  • Don't throw duplicate attribute exception when running FormattingAssembler.AssembleFormatting twice on same document.

Version 3.1.06 : February 7, 2015

  • Added Expand-DocxFormatting Cmdlet
  • Cmdlets do not keep a handle to the current directory, preventing deletion of the directory.
  • Added additional tests to Test-OxPtCmdlets

Version 3.1.05 : January 29, 2015

  • Added GetListItemText_zh_CN.cs
  • Fixed GetListItemText_fr_FR.cs
  • Partially fixed GetListItemText_ru_RU.cs
  • Fixed GetListItemText_Default.cs
  • Added better support in ListItemRetriever.cs
  • Added FileUtils class in PtUtil.cs

Version 3.1.04 : December 17, 2014

  • Added Get-DocxMetrics Cmdlet
  • Added New-WmlDocument Cmdlet
  • Added MetricsGetter.cs module
  • Added MettricsGetter01.cs module, along with sample documents
  • Reworked Add-DocxText, new style of using it with New-WmlDocument

Version 3.1.03 : December 9, 2014

  • Added ChartUpdater.cs module
  • Added ChartUpdater01.cs module, along with sample documents
  • Added Test-OxPtCmdlets Cmdlet

Version 3.1.02 : December 1, 2014

  • Added Add-DocxText Cmdlet

Version 3.1.01 : November 23, 2014

  • Added Convert-DocxToHtml Cmdlet
  • Added Chinese and Hebrew sample documents
  • Cmdlets in this release Clear-DocxTrackedRevision Convert-DocxToHtml ConvertFrom-Base64 ConvertFrom-FlatOpc ConvertTo-Base64 ConvertTo-FlatOpc Get-OpenXmlValidationErrors Merge-Docx New-Docx Test-OpenXmlValid

Version 3.1.00 : November 13, 2014

  • Changed installation process - no longer requires compilation using Visual Studio
  • Added ConvertTo-FlatOpc Cmdlet
  • Added ConvertFrom-FlatOpc Cmdlet
  • Changed parameters for Test-OpenXmlValid, Get-OpenXmlValidationErrors
  • Removed the unnecessary 1/2 second sleep when doing Word automation in the New-Docx Cmdlet

Version 3.0.00 : October 29, 2014

  • New release of cmdlets that are written as 'Advanced Functions' instead of in C#.

Procedures for enhancing Open-Xml-PowerTools

There are a variety of things to do when adding a new CmdLet to Open-Xml-PowerTools:

  • Write the new CmdLet. Put it in the Cmdlets directory
  • Modify Open-Xml-PowerTools.psm1
    • Call the new Cmdlet script to make the function available
    • Modify Export-ModuleMember function to export the Cmdlet and any aliases
  • Update Readme.txt, describing the enhancement
  • Add a new test to Test-OpenXmlPowerToolsCmdlets.ps1

Procedures for enhancing the core C# modules

  • Modify the code
  • Write xUnit tests
  • Write an example if necessary
  • Run xUnit tests on VS2015 Community Edition
  • Run xUnit tests on VS2013 Update 4