APIs for customizing UI

The following features are available in:

PDF.js Express Viewer

PDF.js Express Viewer is a free viewer with limited capabilities compared to PDF.js Express Plus

PDF.js Express Plus

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

Disable features
Disable certain features of the UI such as item caching or annotation tools.

Hide elements
Hide certain parts of the UI, such as annotation tools or the download button.

Change the theme
Change the appearance of the UI.

PDF.js Express Web Viewer
PDF.js Express is a commercial PDF web viewer that wraps around the PDF.js open-source rendering engine.

WebViewer instance
The WebViewer instance is an object that contains functions and namespaces for interacting with the UI and document.