"After implementing and using GroupDocs Viewer for .NET in the project it looks to be working very well. I have tested with a lot of documents and so far so good. Everything I've thrown at it renders nicely and looks just as good as it would in a PDF viewer or MS Word."

Mats Oustad

Senior Consultant/Partner
at Novanet AS

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Document Annotation Library for Your .NET (C#, VB.NET) Apps

GroupDocs.Annotation for .NET allows developers to seamlessly enhance their .NET apps with the capability to display and annotate 50+ types of documents and images. Key benefits include:

Support for PDF, Office & Image Files

Support for PDF, Office & Image Files

The library allows your app users to annotate over 50 file formats, including Microsoft Word, Excel, PowerPoint, Visio, PDF, CAD, raster images and many more. And thanks to the advanced document management options, users can store, share, print and export annotated documents easily.

Native Word & PDF Annotations

Native Word & PDF Annotations

Comments and markup added to DOC/DOCX or PDF files in GroupDocs.Annotation can be exported to native Word or PDF annotations respectively in output files. Likewise, PDF documents can be imported to GroupDocs with annotations in them.

Fully Customizable UI

Fully Customizable UI

The library comes with a web UI that can be customized with your own CSS to make it look as if it was always there. You can customize buttons, toolbars, backgrounds - whatever you need. All toolbar controls and commands can be easily enabled, disabled or removed.

Zero-Footprint Integration

Zero Footprint Integration

The library can be deployed with just a single DLL. There is no need to install any 3rd party software or plugins on the server or client. When building ASP.NET apps, the annotation UI can be embedded into you app with just a few lines of HTML/JavaScript code or a simple iframe.

Cross-Platform Compatibility

Cross-Platform Compatibility

GroupDocs.Annotation works with all modern web-browsers, including IE (8+), Firefox, Chrome, Opera and Safari. It is also a mobile-ready solution so users can access and annotate documents from any web-enabled devices including desktops, mobiles and tablets.

Get Started Now:

Take advantage of our document annotation library for .NET - let end-users annotate Microsoft Office documents, PDF and image files from within your own app. We offer free tech support during the whole integration period. Try the library for free:

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