GroupDocs.Comparison for .NET is a lightweight merge / diff library that allows developers to compare two versions of a PDF, Word (DOC/DOCX), Excel (XLS/XLSX), PowerPoint (PPT/PPTX), ODT, TXT or HTML document.

The library is specifically designed to be easy to integrate into any .NET (ASP.NET / C# / VB.NET) app and comes with a customizable diff view web UI.

Key features and benefits include:

- The library identifies differences both in content and font styles.
- Accept/reject changes when comparing Word files.
- Compare up to 3 Word files.
- Export merged Word files to a resulting file with the native 'Track Changes' feature enabled.
- Compare documents programmatically on the server side.
- Display differences through a web diff view UI.
- Load documents/send the result output from/to streams.
- Save a summary list of all changes in the result output file.

The UI that comes with the library is mobile-ready and works across all popular platforms. It allows end users to view, navigate and manipulate compared documents from any modern browser without having to install any software or plugins. When comparing documents users can:

- View a list of all differences found.
- Quickly navigate between differences with the click of a button.
- Search for, select and copy text to the clipboard right from browser.
- Accept/reject changes when comparing Word files.
- Export merged Word documents to an output file.
- Scroll document pages or turn them with a button click.
- Preview/navigate document pages with thumbnails.

GroupDocs.Comparison for .NET library doesn't have any 3rd-party dependencies and can be easily deployed with just a single DLL. To test the library without restrictions, please feel free to contact GroupDocs sales for a 30-day fully-functional trial.