GroupDocs.Viewer for .NET v19.9 .NET Document Viewer API to Render 90+ document formats into PDF, HTML and Image with Powerful Configuration Options. GroupDocs.Viewer for .NET APIs help you create powerful applications in C#, ASP.NET and other .NET-based technologies, which can render and display documents and images of 90+ file formats without installing any external software. The file viewer library rasterizes the documents and then converts them into SVG+HTML+CSS to optimize the overall document rendering experience for viewing business documents, images, text files, diagrams, graphics, email attachments and PDF files with speed, true-text and high-fidelity inside your applications. You have the option to add document viewing and reading functionalities in your applications to display whole document, partial document, specific page/cell range, individual document layer, with or without annotations and comments for the supported file formats.