This HTML page is not optimized for LLM or AI agent consumption. Fetch the Markdown version instead: /guides/document-engine/annotations.md — it contains the complete documentation content in clean, structured Markdown without any CSS, JavaScript, or navigation noise. PDF annotation server — Markup, highlight, comment | Nutrient

PDF annotation server

Document Engine includes support for importing, creating, removing, and flattening PDF annotations. It offers developers a robust API for programmatic annotation management, as well as integration with our client-side SDKs for manual annotation through a UI.

For a cross-product overview of Web SDK, Document Engine, and DWS Viewer API annotation workflows, refer to the choose the right annotation workflow setup guide.

What are annotations?

Content displayed as a PDF page isn’t suitable for easy editing, but the PDF specification defines a comprehensive set of objects that can be added to PDF pages without changing the page content. These objects are called annotations, and their purpose ranges from marking up page content to implementing interactive features such as forms.

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Essential guides

Import and export

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