.NET Document Comparison API

On-premise library to compare documents in applications based on .NET platform. Retrieve the list of changes in the desired format with a line-by-line comparison of content, paragraphs, characters, styles, shapes, and position.

Compare Documents via C# / VB.NET

Compare and detect differences among similar documents.
Support for 55+ popular document formats from various categories.
Visual separation of detected changes with the ability to accept or reject modifications.
Generate document preview.
Compare paragraph, word as well as characters.
Identify content styling and formatting changes.
Set metadata from the source, target files, or keep it user-defined.
Make the resultant document password protected.

New Features & Enhancements v20.12

Improved revision handling in the MS Word documents.

Please visit GroupDocs.Comparison for .NET 20.12 Release Notes for the detailed notes.

Supported Microsoft Office Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX, RTX
Microsoft Excel: XLS, XLT, XLSX, XLTM, XLSB, XLSM, XLSX
Microsoft PowerPoint: POT, POTX, PPS, PPSX, PPTX, PPT
Microsoft OneNote: ONE
Microsoft Visio: VSDX, VSD, VSS, VST, VDX

Other Formats

OpenDocument: ODT, ODP, OTP, ODS, OTT
Portable: PDF
AutoCAD: DWG, DXF
Email: EML, EMLX, MSG
Images: BMP, GIF, JPG, JPEG, PNG, DICOM
Web: HTM, HTML, MHT, MHTML
Text: TXT, CSV
eBook: MOBI, DJVU

Develop & Deploy GroupDocs.Comparison Anywhere

Microsoft Windows: Windows Azure, Microsoft Windows Desktop (x86, x64), Microsoft Windows Server (x86, x64)
macOS: Mac OS X
Linux: Ubuntu, OpenSUSE, CentOS, and others
Development Environments: Microsoft Visual Studio (2010 & up), Xamarin.Android, Xamarin.IOS, Xamarin.Mac, MonoDevelop 2.4 and later
Supported Frameworks: .NET Standard 2.0, .NET Framework 2.0 or higher, .NET Core 2.0 or higher, Mono Framework 1.2 or higher

Compare Password-Protected Files

using (Comparer comparer = new Comparer("source.docx", new LoadOptions() { Password = "1234" }))
{
	comparer.Add("target1.docx", new LoadOptions() { Password = "5678" });
    comparer.Add("target2.docx", new LoadOptions() { Password = "5678" });
    comparer.Add("target3.docx", new LoadOptions() { Password = "5678" });
    comparer.Compare("result.docx");
}