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Professional PDF.js Viewing & Annotations - Try for free

PDF.js Annotation Library

Add powerful annotation capabilities to any PDF.js application

Try for free
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26 pre built annotations

Let your users add annotations to PDF documents using our JavaScript API. Users can create highlight annotations, shape annotations, measurement annotations, and more.

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Build your own custom annotations

Enhance your PDF.js application by creating custom annotations tailored specifically to your workflow

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Real-time collaboration support

Sync PDF.js annotations in real-time between users and devices. Control which users are allowed to add, edit and delete annotations.

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See what you can do

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Use Cases


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Review document

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Sign document

Easy to integrate

Integrate a PDF.js viewer and annotator into any application with minimal effort. Use our extensive guides and samples to guide you along the way


Integrates into any framework

Seamlessly integrate a PDF.js viewer with annotations into React, Angular, Vue, or any other Javascript Framework



Change the style of your PDF.js viewer and annotator to match your brand and fit seamlessly into your application


Community Support

Have a question or need help with your implementation? Get answers directly from the developers in our community based support forum


Get started today!

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