PDF ANNOTATION SDK
Unlock powerful tools with a PDF annotation library built for your app
Empower your users to highlight text, add notes, draw freely, and explore more than 15 rich annotation types — all easily integrated and seamlessly aligned with the PDF spec.
How it works
The cornerstone of document collaboration
We designed our annotation tools with ease of use in mind, allowing you to provide your users with a document collaboration Swiss Army knife.
step 1
Open the PDF or an image document and select an annotation type (text highlighter, shape annotations, notes, stamps, etc.)
Step 2
Customize your annotations by changing color, border lines, and note icons; creating custom stamps; and more.
step 3
Check out document security permissions, and set specific controls and limitations on annotations.
KEY FEATURES
The tools of the trade
A robust annotation system with a set of easy-to-use tools will make your app the stalwart of document handling in any business environment.
Toolbar
The annotation toolbar enables quick access to all the annotation types in the PDF spec. It’s fully customizable, and it even supports predefined pen tool settings for seamless switching between visual annotation styles.
The annotation toolbar enables quick access to all the annotation types in the PDF spec. It’s fully customizable, and it even supports predefined pen tool settings for seamless switching between visual annotation styles.
Note
Note annotations let you add longer comments to PDF documents. You can also select a custom icon shape and color for the note through the custom note inspector.
Note annotations let you add longer comments to PDF documents. You can also select a custom icon shape and color for the note through the custom note inspector.
Ink
With ink annotations, you can add predefined shapes and create freeform drawings on a PDF document. Color and line thickness are easily adjustable via the annotation inspector in the toolbar.
With ink annotations, you can add predefined shapes and create freeform drawings on a PDF document. Color and line thickness are easily adjustable via the annotation inspector in the toolbar.
Text
Add new rich text directly to the page, and take advantage of many convenient features, like automatic annotation sizing, rotating, grouping, custom font selection, justification, and more.
Add new rich text directly to the page, and take advantage of many convenient features, like automatic annotation sizing, rotating, grouping, custom font selection, justification, and more.
NoZoom Annotation
Set the noZoom property to enhance usability and ensure a consistent viewing experience. All annotations remain the same size, regardless of the PDF’s zoom level.
Set the noZoom property to enhance usability and ensure a consistent viewing experience. All annotations remain the same size, regardless of the PDF’s zoom level.
Enhanced Stamps with Baseline UI
Save a stamp in the browser’s local storage so you can reuse it without having to create a new stamp each time. Customize the stamp to automatically pull in the user ID of the person editing the PDF.
Save a stamp in the browser’s local storage so you can reuse it without having to create a new stamp each time. Customize the stamp to automatically pull in the user ID of the person editing the PDF.
Inspector
The context-sensitive annotation inspector provides fine-grained control over how annotations look — from border and fill colors, to opacity and font settings.
The context-sensitive annotation inspector provides fine-grained control over how annotations look — from border and fill colors, to opacity and font settings.
Benefits
Reimagine collaboration, one annotation at a time
Simplify teamwork with powerful annotation tools that let users create, edit, and share feedback easily and intuitively.
Customization that feels effortless
Personalize every detail with custom icons, reusable stamps, and consistent annotation views — perfect for any document.
Efficiency and security, perfectly balanced
Save time with batch editing and protect content with smart permission controls for a secure, efficient user experience.
