GroupDocs.Annotation API References

This page serves as the entry point to the GroupDocs.Annotation API references.

GroupDocs.Annotation is a set of on-premise APIs that add, render, and manage annotations — text markups, graphic shapes, comments and replies, watermarks, and image stamps — across popular document formats such as PDF, Word, Excel, PowerPoint, images, and CAD, on multiple platforms. The same annotation engine powers .NET, Java, and Python (via .NET), so you get consistent behavior across your whole stack.

Available Products

Select your target platform below to access detailed API code documentation.

Additional Resources

Product Overview

GroupDocs.Annotation is a comprehensive document-annotation SDK that gives developers full programmatic control over adding, rendering, and managing annotations — without requiring Microsoft Office, Adobe Acrobat, or any other third-party software. The same annotation engine is available for .NET, Java, and Python (via .NET), so you get consistent behavior across your whole stack.

Key Features

• Text Markup: Highlight, underline, strike out, squiggly-underline, redact, or replace text.
• Graphic Annotations: Add area, ellipse, point, arrow, distance, and polyline shapes.
• Rich Annotations: Add watermarks, text fields, hyperlinks, and image stamps.
• Comments & Replies: Attach an author and threaded replies to any annotation.
• Manage Annotations: Add, update, get, and remove annotations by id, type, or instance.
• Import / Export: Load existing annotations and export them to another document.