PDF.js Viewer

Incorporate Mozilla’s PDF.js viewer into your pages and posts via a Gutenberg block or a simple shortcode. PDF.js is a javascript library for displaying pdf pages within browsers.

Features:

• Gutenberg Block and Shortcode
• Translation Support (plugin only): Spanish and French included, ready for more languages
• Elegant Theme that adapts to dark and light mode (if browser supports dynamic CSS)
• Customizable buttons
• Page navigation drawer
• Search functionality
• Protected PDF password entry
• Loading bar & displays partially loaded PDF (great for huge PDFs!)
• Document outline
• Classic Editor: Easy to use editor media button that generates the shortcode for you
• Support for mobile devices

Shortcode Syntax:

`

[pdfjs-viewer attachment_id=123 viewer_width=600px viewer_height=700px fullscreen=true download=true print=true]
`

Or use a direct URL:

`

[pdfjs-viewer url=http://www.website.com/test.pdf viewer_width=600px viewer_height=700px fullscreen=true download=true print=true]
`

Shortcode Parameters:

• attachment_id (recommended): ID of the media file in WordPress media library
• url (alternative): Direct URL to PDF file. Use attachment_id when possible for better security.
• viewer_width (optional): Width of the viewer (default: 100%)
• viewer_height (optional): Height of the viewer (default: 800px)
• fullscreen (optional): true/false, displays fullscreen link above viewer (default: true)
• fullscreen_text (optional): Text for the fullscreen link (default: View Fullscreen)
  • Spaces not allowed. Use %20 in place of spaces.
• fullscreen_target (optional): true/false, open the fullscreen link in a new tab (default: false)
• download (optional): true/false, enables or disables download button (default: true)
• print (optional): true/false, enables or disables print button (default: true)
• openfile (optional): true/false, show open file button (default: false)
• zoom (optional): Initial zoom level – auto, page-actual, page-fit, page-width, or percentage like 75, 100, 150 (default: auto)

Want to help develop the plugin? Found a bug? Find us on GitHub. For build instructions and contribution guidelines see the developer guide in DEVELOPER.md.

Admin Notice After Updates / Invalid Block

When you update the plugin, editors may see an admin banner explaining that Gutenberg could show an “Attempt Block Recovery” prompt when editing older posts with PDFs. Clicking it updates the block format; it does not affect what visitors see. You can dismiss the banner, and it won’t reappear until a future release enables it again.

License

This WordPress plugin is licensed under GPLv2 or later.

PDF.js (included in this plugin) is developed by Mozilla and licensed under the Apache License 2.0. See the PDF.js repository for details.