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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Merge & extract annotation in PDF.js Express

PDF.js Express offers a REST API that lets you merge or burn annotations into the underlying PDF documents (when you download the document your annotations will be visible). The REST API also lets you open and display pre-existing annotations when you import a new document into your viewer.

Pricing

The pricing for using the REST API is as follows (calculated monthly):

  • 0-500 actions: $0 (free)
  • 501-9999 actions: $50 USD
  • 10000+ actions: $100 USD

Each successful operation counts as one action. Errors do not count as an action.

Getting started

Our REST API documentation sections provides additional details and step-by-step instructions on using the PDF.js Express utility UI: