Convert DOC to DOCX in C#

High-speed C# library for converting DOC to DOCX

Use our document conversion API to develop high-level, platform independent software for .NET and .NET Core platforms. This is a professional software solution to import and export DOC, DOCX, and many other document formats using C#, F#, VB.NET.

Convert DOC to DOCX using C#

Need to convert DOC files to DOCX programmatically? With Aspose.Words for .NET any developer can convert DOC to DOCX format with just a few lines of C# code.

Modern document-processing C# API creates DOCX from DOC with high speed. Test the quality of DOC to DOCX conversion right in a browser. Powerful C# library allows converting DOC files to many popular formats.

Save DOC as DOCX in C#

The following example demonstrates how to convert DOC to DOCX in C#.

Follow the easy steps to turn a DOC file into DOCX format. Read DOC file from the local drive, then simply save it as DOCX, specifying the required file format by DOCX extension. For both DOC reading and DOCX writing you can use fully qualified filenames. The output DOCX content and formatting will be identical to the original DOC document.

Code example in C# to convert DOC to DOCX format
Input file
Upload a file you want to convert
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Output format
Select the target format from the list
using Aspose.Words;

var doc = new Document("Input.doc");
doc.Save("Output.docx");
using Aspose.Words; var doc = new Document("Input.doc"); doc.Save("Output.docx"); using Aspose.Words; var doc = new Document("Input.doc"); for (int page = 0; page < doc.PageCount; page++) { var extractedPage = doc.ExtractPages(page, 1); extractedPage.Save($"Output_{page + 1}.docx"); } using Aspose.Words; var doc = new Document(); var builder = new DocumentBuilder(doc); builder.InsertImage("Input.doc"); doc.Save("Output.docx"); using Aspose.Words; var doc = new Document(); var builder = new DocumentBuilder(doc); var shape = builder.InsertImage("Input.doc"); shape.ImageData.Save("Output.docx");
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How to convert DOC to DOCX

  1. Install 'Aspose.Words for .NET'.
  2. Add a library reference (import the library) to your C# project.
  3. Open the source DOC file in C#.
  4. Call the 'Save()' method, passing an output filename with DOCX extension.
  5. Get the result of DOC conversion as DOCX.

C# library to convert DOC to DOCX

There are three alternative options to install "Aspose.Words for .NET" onto your system. Please choose one that resembles your needs and follow the step-by-step instructions:

System Requirements

Our product is fully cross-platform and supports all major .NET implementations following '.NET Standard 2.0' specification:

  • Microsoft .NET Framework, starting from the earliest 2.0 version, and ending with the latest '.NET Framework 4.8'
  • .NET Core, starting from the earliest 2.0, and ending with the latest '.NET 6'
  • Mono >= 2.6.7

As far as .NET code doesn't depend on the underlying hardware or operating system, but only on a Virtual Machine, you are free to develop any kind of software for Windows, macOS, Android, iOS and Linux. Just make sure you have installed the corresponding version of .NET Framework, .NET Core, Windows Azure, Mono or Xamarin.

We recommend using Microsoft Visual Studio, Xamarin, and MonoDevelop integrated development environments to create C#, F#, VB.NET applications.

Fore more details please refer to Product Documentation.

Other Supported DOC Conversions

You can convert DOC to many other file formats:

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