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PDF.js Express Free Viewerplay_arrow

Professional PDF.js Viewing - Free

PDF.js Express Plusplay_arrow

Professional PDF.js Viewing & Annotations - Try for free

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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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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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PDF.js Express Documentation

Our Products

PDF.js Express Plus

PDF.js Express Plus is a commercial PDF web viewer that wraps around the PDF.js open-source rendering engine. It offers developers a way to quickly add annotation, e-signatures, and form filling to their PDF viewer. Compatible with all JavaScript frameworks, the viewer can be directly embedded and customized within any web application.

PDF.js Express Viewer

PDF.js Express Viewer is a free, in-browser PDF viewer. It has a beautiful, customizable UI and features like text search, text select, and high fidelity zooming.

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Open/Export Documents

Documents can be loaded from a URL, blob, base64, or with the filesystem, while documents can be exported for storage on a server.

Open with URL
Open with Blob
Open with base64
Open with filesystem
Save as a blob

Customizing the UI

PDF.js Express has a responsive UI that is completely open-source, giving developers the freedom needed to build unique, world-class user experiences and, ultimately, a successful product.

Overview
Customizing toolbar buttons
Customizing color & style
Hiding & disabling buttons

Annotation

PDF.js Express imports annotations into the viewer through XFDF data. They can be created by the user through the UI, or programmatically. Annotation data can be imported or saved to a server/database. Annotation data can be imported or saved to a server/database, or merged directly into a document with a REST API.

Overview
XFDF format
Saving and loading annotations
Merge and extract annotations
Custom annotations
Annotation permissions
Annotation events/triggers

Adding More Functionality

Collaborating in real time
Working with forms
Signatures
Measuring distance, perimeter and area