.NET API for Document Annotation

Its an on-premise API that seamlessly integrates document annotation features into your .NET applications. Apply graphic, text and watermark annotations.

Document Annotation Processing Features

Import document annotations.
Support for adding, removing or replying to annotation comments.
Export annotated document back to its original format.
Render document pages as images.
Generate document thumbnails or document image preview.
Support for default cache (local disk) or custom cache (Amazon S3,Dropbox etc.).
Get list of supported file formats.
Fetch document information, such as, page count & file size.
Extract annotations from a document and serialize to XML format.
Remove previously added annotations from a document.
Update specific annotation properties (size, color etc.).

New Features in Version 20.5

Implemented managing different versions of annotated documents for Images and Diagrams.

For the detailed notes, please visit GroupDocs.Annotation for .NET 20.5 Release Notes.

Microsoft Office Annotation Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX, RTF Microsoft Excel: XLS, XLSB, XLSM, XLSX Microsoft PowerPoint: PPT, PPTX, PPSX, PPS Microsoft Visio: VSD, VSDX, VSS, VST

Other Supported Formats for Annotation

Portable: PDF (PDF/A-1a, PDF/A-1b, PDF/A-2a) OpenDocument: ODT, ODS, ODP Images: TIF, TIFF, JPG, JPEG, PNG, BMP AutoCAD: DWG, DXF Email: EML Web: HTML Others: DCM

Graphic Annotation

Area: marks an area with a rectangle
Arrow: draws an arrow on a document
Distance: measures a distance between objects in a document
Ellipse: draws elliptic annotation in a document
Point: sticks comments to any point in a document
Polyline: draws shapes and freehand lines
Resource Redaction: fills black rectangle with fixed position
TextField: adds rectangle with a text inside

Text Annotation

Highlight: highlights and comments selected text
Link: adds a hyperlink to the document
Replacement: replaces original text with user’s text
Strikeout: marks text with a strikethrough styling
Text Redaction: fills part of text with black rectangle
Underline: marks text with an underline styling

Watermark Annotation

Diagonal: adds diagonal text watermark
Horizontal: adds horizontal text watermark

Supported Platforms

GroupDocs.Annotation for .NET supported platforms are listed below:

.NET Standard 2.0: Any type of .NET Standard 2.0 application is supported (since Q4 2019).
.NET Framework: Any type of .NET Framework version 2.0 (or later) application is supported - ASP.NET, Web Services, WinForms, WPF and others. Full support for 32-bit and 64-bit.
Windows Azure: GroupDocs.Annotation for .NET runs on Windows Azure.
Mono: You can use GroupDocs.Annotation for .NET to build applications with Mono.