Convert PPTX to DOCX using C# or Free Online App

Build PowerPoint PPTX Presentation to Word DOCX Document conversion apps on .NET Framework, .NET Core, Windows Azure, Mono or Xamarin Platforms

How to Convert PPTX to DOCX Using C#?

Automating batch conversion of PowerPoint pptx presentations to Word docx files can be a time-consuming and tedious task. Fortunately, with the help of Aspose.Slides for .NET and Aspose.Words for .NET APIs, this process can be streamlined and automated. Aspose.Slides for .NET is a powerful API that allows developers to create or modify Microsoft PowerPoint slides, while Aspose.Words for .NET is a word processing API that can process or manipulate Microsoft Word documents. Both APIs are included in the Aspose.Total for .NET package, which makes it easy to use them together for batch conversion of files.

To get started with batch conversion, you can either download the Aspose.Total for .NET package directly from the NuGet package manager or use the following commands from the Package Manager Console. Once you have installed the necessary packages, you can write a script or code to automate the conversion process for multiple files, saving you time and effort.

Package Manager Console Command

PM> Install-Package Aspose.Total

Steps to Convert PPTX to DOCX via C#

Aspose.Total makes it easy for the developers to load & convert PPTX files to DOCX in just a few lines of code.

  1. Add reference of Aspose.Slides for .NET and Aspose.Words for .NET
  2. Load PowerPoint PPTX presentation using Aspose.Slides.Presentation class
  3. Save the document into MemoryStream Object
  4. Create Aspose.Words.Document and intialize it with MemoryStream Object
  5. Save the document using Aspose.Words.Document.Save(“output.docx”, SaveFormat.Docx)

System Requirements

Aspose.Total for .NET is supported on all major operating systems. Just make sure that you have the following prerequisites.

  • Microsoft Windows or a compatible OS with .NET Framework, .NET Core, Windows Azure, Mono or Xamarin Platforms.
  • Development environment like Microsoft Visual Studio.
  • Aspose.Slides for .NET and Aspose.Words for .NET DLL referenced in your project.

Steps to convert a PPTX to DOCX using C#

Aspose.Slides.Presentation pptx = new Aspose.Slides.Presentation("source.pptx");

var stream = new MemoryStream();

pptx.Save(stream, Aspose.Slides.Export.SaveFormat.Html);
stream.Seek(0, SeekOrigin.Begin);

// Load the content of the presentation to a Word document
var docx = new Aspose.Words.Document(stream);
// Save the Word DOCX document
docx.Save("output.docx", Aspose.Words.SaveFormat.Docx);

Online Converter for PPTX to DOCX

About Aspose.Total

Aspose.Total for .NET is a collection of over 30 .NET components that provide a wide range of features for developers. Here are some of the features that Aspose.Total for .NET provides:

  1. Document Conversion: Aspose.Total for .NET provides components for converting documents to and from various file formats, including PDF, HTML, DOC, DOCX, XLS, XLSX, PPT, and more.
  2. Reporting: Aspose.Total for .NET provides components for creating reports and generating documents based on data from various data sources, including SQL databases, XML, JSON, and more.
  3. Imaging: Aspose.Total for .NET provides components for working with images, including image processing, resizing, and conversion between various image formats.
  4. PDF Manipulation: Aspose.Total for .NET provides components for working with PDF documents, including creating, editing, merging, splitting, and converting PDF files.
  5. Barcodes: Aspose.Total for .NET provides components for generating and reading various types of barcodes, including QR codes, Code 39, UPC, and more.
  6. Email: Aspose.Total for .NET provides components for working with email, including sending and receiving emails, managing email attachments, and more.
  7. OCR: Aspose.Total for .NET provides components for performing optical character recognition (OCR) on scanned documents and images.

These are just some of the features that Aspose.Total for .NET provides. It is a comprehensive collection of .NET components that can help developers to perform a wide range of tasks related to document manipulation, conversion, and automation.


  • How can I convert PPTX to DOCX Online?
    Online App for PPTX conversion is integrated above. To use the app, you can add your PPTX file by either dragging and dropping it into the designated area or clicking inside the area to import the file. Once the file is added, click the Convert button to initiate the conversion process. After the PPTX to DOCX conversion is complete, you can download your newly converted file with just one click, and it will be available in DOCX format.
  • How long does it take to convert PPTX?
    this online converter is fast, but the speed of the PPTX to DOCX conversion mainly depends on the size of the PPTX file being converted. Smaller PPTX files can be rendered into DOCX format within seconds. Additionally, if you have integrated the PPTX to DOCX conversion code within a .NET application, the conversion speed will depend on how well you have optimized your application for the conversion process.
  • Is it safe to convert PPTX to DOCX using free Aspose.Total converter?
    Of course! Once the PPTX to DOCX conversion process is complete, the download link for the converted DOCX file will be instantly available. All uploaded files, including PPTX files, are deleted from the system after 24 hours, and the download links cease to function after this time period. The online converter ensures the safety and privacy of your files, and the integrated app is available free of cost for testing purposes. This allows users to check the result before integrating the code into their projects.
  • What browser should I use to convert PPTX?
    You can utilize any contemporary web browser such as Google Chrome, Firefox, Opera, or Safari to convert PPTX files to DOCX online. However, if you are creating a desktop application, the Aspose.Total PPTX Conversion API is recommended for a smooth and seamless conversion process.

Explore PPTX Conversion Options with .NET

Convert PPTX to CSV (Comma Seperated Values)
Convert PPTX to DIF (Data Interchange Format)
Convert PPTX to EXCEL (Spreadsheet File Formats)
Convert PPTX to FODS (OpenDocument Flat XML Spreadsheet)
Convert PPTX to MARKDOWN (Lightweight Markup Language)
Convert PPTX to ODS (OpenDocument Spreadsheet)
Convert PPTX to SXC (StarOffice Calc Spreadsheet)
Convert PPTX to TSV (Tab-separated Values)
Convert PPTX to XLAM (Excel Macro-Enabled Add-In)
Convert PPTX to XLS (Microsoft Excel Binary Format)
Convert PPTX to XLSB (Excel Binary Workbook)
Convert PPTX to XLSM (Macro-enabled Spreadsheet)
Convert PPTX to XLSX (Open XML Workbook)
Convert PPTX to XLT (Excel 97 - 2003 Template)
Convert PPTX to XLTM (Excel Macro-Enabled Template)
Convert PPTX to XLTX (Excel Template)

What is PPTX File Format?

The PPTX file format is the successor to the PPT (PowerPoint Presentation) format and is used by Microsoft PowerPoint, the popular presentation software included in the Microsoft Office suite. PPTX files were introduced with the release of Microsoft Office 2007 and are based on the Open XML file format.

PPTX files store presentations as a collection of individual slides, each containing various elements such as text, images, shapes, charts, tables, and multimedia content. The format uses XML-based encoding, which allows for more efficient storage, improved data recovery, and enhanced compatibility with other software applications.

One of the key advantages of the PPTX format is its smaller file size compared to the older PPT format. This is achieved through improved compression techniques and the elimination of redundant data, resulting in more compact files that are easier to share, transfer, and store.

PPTX files also offer advanced features and capabilities, including support for enhanced formatting options, slide transitions, animations, and embedded multimedia elements. The format allows for greater flexibility in designing and customizing presentations, enabling users to create visually appealing and interactive slideshows.

PPTX files can be opened, edited, and presented using Microsoft PowerPoint or compatible software applications across different platforms, including Windows, macOS, and mobile devices. They can be shared via email, uploaded to cloud storage services, or accessed through collaboration platforms for seamless teamwork and presentation delivery.

What is DOCX File Format?

DOCX is a file format developed by Microsoft specifically for their word processing software, Microsoft Word. Its purpose is to provide a versatile and reliable format for creating and sharing documents across various platforms and devices. Widely adopted in business, academia, and personal communication, DOCX files offer numerous advantages.

One key advantage of the DOCX format is its seamless integration with other Microsoft Office applications like Excel and PowerPoint. This integration enables users to effortlessly incorporate tables, charts, and multimedia content into their documents, enhancing their visual appeal and overall effectiveness. Furthermore, DOCX files can be conveniently converted to other widely used formats such as PDF, HTML, and RTF, ensuring compatibility and portability across different systems.

The flexibility of the DOCX format extends to its support for advanced formatting options. Users can employ styles, themes, and templates to create professional-looking documents with consistent branding and formatting. This eliminates the need for intricate technical skills, empowering users to produce polished and visually appealing content effortlessly.

Another significant advantage of DOCX is its extensive compatibility with a wide range of software and devices, including popular operating systems such as Windows, macOS, and Linux. This compatibility ensures that documents can be seamlessly accessed, edited, and shared across diverse environments, fostering efficient collaboration and communication.