Get Started

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Learn more

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Common use cases

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Open a document

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Save a document

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Viewer

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UI Customization

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Annotations

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Collaboration

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Forms

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Signature

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Searching

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Measurement

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PDF.js Express REST API

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Migration Guides

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Customizing PDF.js Express Viewer

The following features are available in:

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PDF.js Express Viewer

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PDF.js Express Viewer is a free viewer that has limited capabilities compared to PDF.js Express Pro

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PDF.js Express Plus

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PDF.js Express Plus is a paid product that supports annotating, signing, form filling and more

PDF.js Express Web Viewer is highly configurable and comes with a rich set of APIs which allow developers to customize and manipulate documents in many ways. These guides will show you the best place to make your customizations.

Get started

Setup PDF.js Express for UI customization
To setup PDF.js Express to display and enable UI customizations.

Customizing header
To customize the header items.

Customizing style
To customize the style or theme.

Hiding DOM elements
To hide DOM elements initially and dynamically.

Localization
To leverage i18next for languages and internationalization support.

Advanced customization
To branch or fork the source code and make your own unique customizations.