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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Measurement

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PDF.js Express REST API

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UI & toolbar customization sample

Customize UI
Shows how to customize the UI using PDF.js Express Web Viewer APIs. Includes modifying header, enabling/disabling features and hiding/showing individual elements.
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Customize form fields
Shows how to change color and opacity of form fields.
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Internationalization
Shows how to switch language.
JS source code Launch demo