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Professional PDF.js Viewing & Annotations - Try for free

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Common use cases

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Open a document

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Viewer

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UI Customization

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Annotations

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Forms

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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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Add signatures to PDFs

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

Clicking the signature button in the header will open the signature dialog immediately. Users can also choose to save the signature and preview it before being drawn on the document.

new signature modal

If there are any saved signatures, clicking the signature button will open an overlay in which signatures can be chosen and applied directly.

new signature overlay