PressFlip PDF Viewer

PressFlip PDF Viewer is a responsive WordPress PDF viewer for embedding PDF documents directly inside posts, pages, custom post types, widgets, and templates.

The plugin uses a locally bundled copy of Mozilla PDF.js to display documents with normal vertical scrolling. Visitors can read multi-page PDFs, move between pages, adjust zoom, use Fit to Page or Fit to Width, print the document, or download the original PDF when those controls are enabled.

Create reusable PDF viewers from the WordPress Media Library or a direct public PDF URL. Add a viewer with the PressFlip Gutenberg block or the [pressflip_pdf] shortcode. The interface is responsive and supports multiple independent PDF viewers on the same page.

Main Features

• Responsive PDF viewer with vertical page scrolling.
• WordPress Media Library and external PDF URL support.
• Gutenberg PDF viewer block and flexible shortcode.
• Previous and next page navigation with current and total page numbers.
• Zoom in, zoom out, reset, Fit to Page, and Fit to Width controls.
• Optional PDF download and print buttons.
• Mobile-friendly toolbar and keyboard navigation.
• Multiple PDF viewers can run independently on one page.
• Saved viewer settings for consistent document embeds.
• No page-flip animation, tracking, paid service, or iframe-based primary renderer.

Shortcode Examples

Embed a saved viewer:

[pressflip_pdf id="123"]

Embed a public PDF URL directly:

[pressflip_pdf url="https://example.com/document.pdf"]

Override selected viewer settings:

[pressflip_pdf id="123" width="100%" height="750px" zoom="110" download="yes" print="yes"]

Third-Party Libraries

PressFlip PDF Viewer includes Mozilla PDF.js version 3.2.146.

• Library: PDF.js
• Copyright: Mozilla and PDF.js contributors
• License: Apache License 2.0
• Runtime files: assets/pdfjs/pdf.min.js and assets/pdfjs/pdf.worker.min.js
• Human-readable upstream source: https://github.com/mozilla/pdf.js/tree/v3.2.146
• Upstream build instructions: https://github.com/mozilla/pdf.js/tree/v3.2.146#building-pdfjs

The PDF.js display library and worker are bundled locally. No executable PDF viewer code is loaded from a third-party CDN.

Source Code

PressFlip’s own JavaScript and CSS are distributed in human-readable form and require no build step:

• admin/js/pressflip-admin.js
• public/js/pressflip-viewer.js
• blocks/pdf-viewer/index.js
• admin/css/pressflip-admin.css
• public/css/pressflip-viewer.css
• blocks/pdf-viewer/editor.css
• blocks/pdf-viewer/style.css

The minified third-party PDF.js runtime files are generated by the upstream Mozilla PDF.js project. Their maintained source code and build instructions are linked in the Third-Party Libraries section above.

Privacy

PDFs render in the visitor’s browser. PressFlip PDF Viewer does not collect viewing analytics or send document data to a tracking service. In external URL mode, the visitor’s browser connects directly to the third-party host serving the PDF.