Compare two documents in C#. Programmatically find differences between PDF, Word, HTML, Markdown, TXT and other formats.

Compare Documents in C#

Document comparison using 'Wordize for .NET' is fast, simple, and efficient. Whether you're working with contracts, reports, or collaborative draft materials, Wordize simplifies the process of identifying changes between any two documents. The C# API accurately identifies and highlights differences such as text edits, formatting changes, and structural modifications. Wordize is the perfect tool for automating document comparison processes in your .NET applications. Save time, increase accuracy, and ensure consistency in your documents with our powerful API.

Key Features

Character or word-level document comparison for highly accurate results.
Identification of differences in text, formatting, headers/footers, and tables.
Flexible customization of comparison methods using parameters such as ignoring comments, formatting, or headers/footers.
Support for a wide range of document formats, including DOCX, PDF, TXT, and RTF.

Practical Applications

Legal industry. Quickly and efficiently identify changes in contracts, agreements, or policies.
Financial sector. Detect changes in financial reports or regulatory documents.
Collaborative content work. Automate version tracking of documents in team projects.
Publishing. Ensure consistency between versions during editorial review.

Wordize provides consistent and reliable comparison results even for the most complex documents. Advanced customization options allow developers to adapt the comparison process to specific requirements, such as ignoring trivial formatting changes while focusing on critical differences in content. Whether you're creating document management systems or automating content verification processes, Wordize provides the necessary flexibility and accuracy.

Test our product's capabilities in our online demo by uploading your documents, configuring comparison parameters, and downloading the comparison result to your computer.

Run code

Upload the source document

Upload the second document to compare with the source

Select the target format from the list

using Wordize.Comparing;

Comparer.Compare("Input1.docx", "Input2.docx",
    "Output.pdf", "Author Name", DateTime.Now);

							using Wordize.Comparing;

Comparer.Compare("Input1.docx", "Input2.docx",
    "Output.pdf", "Author Name", DateTime.Now);

							using Wordize.Comparing;
using Wordize.Saving;

var imageStreams = Comparer.CompareToImages("Input1.docx", "Input2.pdf", 
    new ImageSaveOptions(SaveFormat.Pdf), "Author Name", DateTime.Now);

foreach (var (stream, page) in imageStreams.Select((s, i) => (s, i)))
{
    using var _ = stream;
    stream.Position = 0;
    
    using var file = File.Create($"Output_{page + 1}.pdf");
    stream.CopyTo(file);
}
			

					Run code
				

How to compare two documents (Word, PDF, HTML, Markdown) in C#

Install Wordize for .NET.
Add a library reference (import the library) to your C# project.
Call the Compare method to find differences between documents.
Get the results of your document comparison in a separate file.

System Requirements

Our product is fully cross-platform and supports all major .NET implementations:

.NET ≥ 5.0
.NET Core ≥ 2.0
.NET Standard ≥ 2.0
.NET Framework ≥ 3.5
MonoMac
MonoAndroid
Xamarin

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.