Compare PDF Files in C#

In today’s digital world, managing and comparing documents is a crucial task, especially in businesses and legal domains. When working with PDF documents in C#, Aspose.Words for .NET offers a powerful solution for comparing PDF documents. In this blog post, we will explore how to compare PDF documents in a C# application, helping you streamline document comparison and revision processes.

C# Library to Compare PDF Files - Free Download

Aspose.Words for .NET is a feature-rich library that allows developers to work with various document formats, including DOCX, PDF, and more, in .NET applications. It provides a wide range of document processing capabilities, such as creating, editing, converting, and comparing documents, making it an essential tool for document management tasks.

To install the library from NuGet, you can use the following command. Or you can download it from the Downloads section.

PM> Install-Package Aspose.Words 

Compare Two PDF Files in C#

PDF comparison with Aspose.Words for .NET is a simple task. You only need to upload the PDF files, convert them to editable Word format, and get the comparison results. Let’s go through the complete process of comparing PDF documents in C# with the help of a code sample.

  • First, load both PDF files using the Document class.
  • Then, convert PDF files to editable Word format using Document.Save() method.
  • Set desired options using CompareOptions class and compare documents using Document.Compare() method.
  • Finally, save the PDF file containing differences using Document.Save() method.

The following code sample shows how to perform the PDF comparison in C#.

The following screenshot shows the comparison of two PDF files.

Comparison of PDF Files

Get a Free License

You can get a free temporary license to compare PDF files without evaluation limitations.

Explore C# PDF Comparison Library

You can visit the documentation of Aspose.Words to explore other useful features. In case of any questions, you can ask us via our forum.


Comparing PDF documents in C# is a valuable feature for businesses and organizations that rely on document management. Aspose.Words for .NET simplifies this process, offering a reliable and efficient way to compare PDF documents and generate detailed comparison results. This library empowers developers to automate document comparison and revision tasks, saving time and ensuring accuracy in document management.

In this article, you have learned how to compare two PDF files in C#. By following the steps outlined in this blog post, you can harness the capabilities of Aspose.Words for .NET to compare PDF documents and enhance your document management workflows.

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