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Professional PDF.js Viewing & Annotations - Try for free

Customize your PDF.js Viewer

Create a custom PDF.js Viewer for your application using our Javascript API

Try for free
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Beautiful by default

Our custom PDF.js viewer comes with a meticulously designed UI out of the box. If our design does not suit your needs, every single component can easily be customized

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Open source

PDF.js Express's UI is completely open source. Dig in to the source code and make fine tune custom changes as you need.

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Easy to use

Our customization APIs are extensive and easy to use. Easily change themes, add buttons, or customize the toolbar.

Try out the demo

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See what you can do

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Use Cases


View other use cases

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Customize UI

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Dark mode

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Light mode

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Hide Toolbar

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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