@pdfrx/react

React components and hooks for the pdfrx_web canvas viewer. Start with the all-in-one PdfrxViewerApp, compose the supplied UI pieces, or build custom UI with headless hooks.

npm package · Live demo · API reference · Detailed guide

Highlights

• The all-in-one viewer includes toolbar, responsive thumbnails/outline sidebar, search, forms, annotations, page editing, print, and download.
• The same functionality is available as composable components and headless hooks, so applications can own as much of the UI as they need.
• Annotation, form, and page changes share one chronological Undo/Redo history.
• PDF and image opening, thumbnail insertion/reordering, and image annotation drops are supported by the standard UI.
• Two-page book layouts, rectangular image capture, marquee zoom, and browser fullscreen are available as composed controls; the all-in-one app keeps the specialized layout/capture tools and printing hidden until explicitly enabled.
• Declarative feature groups and effective PDF permissions consistently hide or disable standard print, page-editing, annotation, and form entry points.
• English, Japanese, Simplified and Traditional Chinese, French, and German are built in, with string overrides for additional locales.
• CSS custom properties provide theming and responsive behavior; server rendering and React StrictMode are supported.
• Application overrides can retain the standard chrome while replacing open, page mutation, and export operations.

Install

npm install @pdfrx/react react react-dom
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Minimal usage

import { PdfrxViewerApp } from '@pdfrx/react';
import '@pdfrx/react/styles.css';

export function App() {
  return (
    <PdfrxViewerApp
      src="/manual.pdf"
      wasmModulesUrl="/pdfium/"
      style={{ height: '100dvh' }}
    />
  );
}
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Copy pdfium_worker.js and pdfium.wasm from node_modules/@pdfrx/engine/assets/ into the public /pdfium/ directory. Remote PDF URLs must allow browser CORS access.

Browser printing is supported on desktop platforms. On iOS/iPadOS the standard print button is omitted because WebKit cannot reliably isolate PDF pages from the surrounding viewer UI; use the save/download action instead.

Transparent embedding

The canvas background and the all-in-one app background are separate layers. To reveal the embedding application's background through PdfrxViewerApp, make both transparent:

<PdfrxViewerApp
  src="/manual.pdf"
  wasmModulesUrl="/pdfium/"
  backgroundColor="transparent"
  style={{ height: '100dvh', background: 'transparent' }}
/>
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backgroundColor="transparent" clears the viewer canvas around PDF pages. The inline background override removes the default var(--pdfrx-bg) fill on the .pdfrx-app wrapper; omitting it reveals that themed wrapper background, not the application behind it.

Choose an integration level

• PdfrxViewerApp: ready-made toolbar, sidebar, search, forms, annotations, print, and save UI.
• PdfrxProvider with PdfViewerSurface: compose the supplied components into your own layout.
• Hooks such as usePdfNavigation, usePdfZoom, and usePdfSearch: own the UI while reusing viewer state.

Next steps

• The React guide covers composition, hooks, editing, save/history behavior, localization, context menus, theming, and runtime notes.
• Customizing PdfrxViewerApp explains application-controlled open, page, and export operations.
• Use @pdfrx/colab for synchronized multi-user editing.
• Related packages: @pdfrx/engine · @pdfrx/viewer · @pdfrx/react

License

MIT