.NET Viewer APIs - View any document within your application

View multi format documents in HTML, image, PDF or in original format within your C#, WPF and ASP.NET applications

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GroupDocs.Viewer for .NET

GroupDocs.Viewer for .NET


GroupDocs.Viewer for .NET is a powerful documents viewer API for rendering over 50 documents and image formats within your .NET applications. It rasterize documents and images both, renders text and converts them to SVG+HTML+CSS – offering a high fidelity true-text, native document rendering.

Using native .NET document viewer API – programmers can use set of predefined options for rendering documents as HTML or Image formats for whole document, page by page or custom range of pages within their ASP.NET, C# and .NET applications

Advanced Document Viewer API Features



Over 50 file formats supported


View any format document in its original format or in HTML, Images or PDF format


Cache for fast loading of repetitive viewing of same file


Remove cache files feature


Rotate and reorder pages while viewing


Add watermarks


Add custom font directories in configuration


Get original files attached with emails as HTML or Image representation


Get document information such as extension, type, name, pages etc

Viewing document options

  • Four options to display document
    • HTML – Renders document into HTML by converting it to SVG+HTML+CSS
    • Images – Raster the document and convert the document pages into images form
    • PDF – Raster document to PDF Format
    • Original Format – Get document into its original format within your application
  • Cache for fast loading of repititive viewing of same file
    • UseCache option for repetitive viewing of the same file supports HTML image formats
  • Remove cache files feature
    • Remove all cache files
    • Remove cache files older than a time span
  • Transformation
    • Rotate pages while rendering documents
    • Reorder pages
    • Add watermark
  • Email Attachments
    • Get original files attached with emails
    • Get file attachements as HTML representation
    • Get file attachements as Image representation
  • Get document information
    • Date created
    • Document type
    • Document type format
    • Extension
    • File type
    • Guid
    • Last modification date
    • Name
    • Page count
    • Size
    • Page data
  • Encoding documents
    • Encode documents according to their desired encoding standards
    • Microsft Word
    • Excel
    • Email documents
  • Custom Input Data Handlers
    • Renders documents located at remote locations like FTP or Cloud Storage
  • Custom Fonts
    • Add custom font directories in configuration

Supported Document and Image Formats

The supported formats for documents viewing are mentioned below:

  • Microsoft Word : DOC, DOCM, DOCX, DOT, DOTX, DOTM
  • Excel: XLS, XLSX, XLSM, XLSB
  • PowerPoint Presentation : PPT, PPTX, PPS, PPSX
  • Project Files: MPT, MPP
  • Visio documents: VSD, VDX, VSDX, VSS, VSX, VST, VTX, VSDX, VDW
  • Outlook Email Files : MSG, EML, EMLX
  • OpenDocument Formats: ODT, OTT, ODS, ODP, OTS
  • Rich Text Format: RTF
  • Plain Text Format: TXT
  • CSV
  • PDF
  • Images : TIFF, multi-page TIFF, WebP, BMP, GIF, JPG, PNG, WebP
  • XML
  • XML Paper Specification: XPS
  • AutoCAD Drawing Formats: DXF, DWG
  • Electronic Publication: EPUB
  • Windows Icon: ICO
  • Metafile : WMF , EMF
  • OpenDocument Presentation Template : OTP

Viewer API Installation and Usage

API can be consumed on .NET Framework starting from V2.0 and Mono Framework starting from V1.2. Viewer API files can be installed/downloaded using following smooth ways.

Support and Learning Resources


GroupDocs.Viewer offers document automation APIs for other popular development environments as listed below: