Document Annotation Cloud REST API

GroupDocs.Annotation Cloud offers a comprehensive solution for seamless document annotation. Easily integrate functionalities like adding comments, highlights, watermarks, and redactions to various document formats, including PDF, Word, Excel, and PowerPoint, within your applications.

Available SDKs

GroupDocs.Annotation

Cloud SDK for .NET

GroupDocs.Annotation

Cloud SDK for Java

GroupDocs.Annotation

Cloud SDK for PHP

GroupDocs.Annotation

Cloud SDK for Python

GroupDocs.Annotation

Cloud SDK for Ruby

GroupDocs.Annotation

Cloud SDK for Node.js

GroupDocs.Annotation Cloud Feature Set

Document Annotations

Text Annotations - Add comments or explanations within the text.
Area Annotations - Highlight specific areas of a document for detailed notes.
Point Annotations - Mark specific points of interest in a document.
Arrow Annotations - Direct viewers’ attention to specific elements with arrow markers.
Strikeout/Underline Annotations - Highlight text by striking through or underlining for easy reference.

Markup Features

Highlighting - Mark important sections of the text with highlights.
Redaction - Completely hide or censor sensitive content within documents.
Watermarking - Protect documents by adding watermarks to indicate ownership.

Annotation Management

Edit Annotations - Modify or update existing annotations in documents.
Delete Annotations - Remove unnecessary or outdated annotations.
Export Annotations - Extract annotations to store separately or share with others.

Collaboration Features

Commenting - Enable multi-user collaboration with thread-based commenting features.
Version Control - Keep track of changes made to annotations with versioning tools.
Real-Time Updates - Implement updates when multiple users edit the same document.

Security Features

Access Control - Secure document annotations with user-based access control.
Role-Based Permissions - Assign different permission levels to users to protect sensitive annotations.
Encryption - Ensure data is encrypted during document transfer and storage.

Advanced Features

Combine Annotations - Merge multiple annotations into one document.
Layered Annotations - Manipulate layered annotations for flexible redacting and marking.
Custom Annotation Styles - Set custom colors, opacity, and size for annotations.
API Integration - Integrate with other systems using REST APIs.
Scalable Infrastructure - Supports high‑load environments with scalable architecture.

Supported Annotation Types and Features

Area Annotation

• Mark up an area within the document page with a rectangle.
  • Allows users to highlight a specific region on a document.
  • Box dimensions can be customized to fit the area of interest.
  • Supports replies to annotations for collaborative reviews.
  • The area annotation can include additional comments.

Distance Annotation

• Measures the distance between objects in a document.
  • Enables precise measurements within document content.
  • Coordinates and dimensions can be defined for exact measurements.
  • Useful for architectural and engineering documents where distance measures are critical.

Ellipse Annotation

• Draws elliptic annotations on a document page.
  • Enables users to highlight circular or elliptic areas.
  • Customizable radius, color, and opacity for clear visibility.
  • Supports multiple replies for added comments on the marked area.

Image Annotation

• Adds an image to a specific area of the document.
  • Inserts images within a document page for visual reference.
  • Supports positioning and resizing of images.
  • Useful for adding logos, stamps, or visual marks.

Link Annotation

• Adds a hyperlink to a document.
  • Links specific text or areas of the document to external URLs.
  • Provides support for web navigation or referencing additional resources.
  • Can be styled with different colors to differentiate from the text.

Multiple Annotation

• Allows adding multiple types of annotations simultaneously.
  • Supports adding a combination of annotations (e.g., text, images, shapes) at once.
  • Useful for reviewing documents where different annotation types are needed on the same page.
  • Multiple annotations can be grouped or treated separately.

Point Annotation

• Sticks comments to a specific point in the document.
  • Comments are associated with a specific point or location within the document.
  • Ideal for collaborative document reviews where pinpointing feedback is necessary.
  • Supports color and size adjustments for better visibility.

Polyline Annotation

• Draws connected lines to form a polyline in a document.
  • Used for drawing complex shapes or marking specific paths in a document.
  • Supports multiple points connected by straight lines.
  • Allows customization of line thickness, color, and opacity.

Resource Redaction Annotation

• Fills a black rectangle in a fixed position to hide sensitive information.
  • Effectively redacts confidential information from documents.
  • The black box can be sized and positioned over any sensitive data.
  • Commonly used for legal documents, financial statements, or personal identification numbers (PINs).

Squiggly Annotation

• Adds a wavy underline to mark text.
  • Highlights text with a squiggly underline for attention.
  • Ideal for marking spelling or grammatical errors.
  • Color and line style can be adjusted to differentiate from other annotations.

Supported Annotation Formats