PDF.js Express Plusplay_arrow

Professional PDF.js Viewing & Annotations - Try for free

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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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Compare

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Advanced Capabilities

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PDF.js Express REST API

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Migration Guides

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Development

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 with limited capabilities compared to PDF.js Express Plus

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PDF.js Express Plus

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PDF.js Express Plus is a commercial PDF SDK for viewing, annotating, signing, form filling and more

With a license key

The first 500 actions per key per month are free. You may use these free actions for testing purposes if you wish.

Since the client side license keys are domain locked, we also allow 500 free actions per month coming from localhost (with a valid license key). The output of these localhost actions will be watermarked/mangled, but still usuable for testing purposes.

If you require more actions for testing, please contact us and we'll help you out.

Without a license key

You may use any API without a license key, however the output will be watermarked/mangled and usage is heavily rate limited. Trial usage without a license key is free.