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PDF.js Express REST API


Migration Guides


Integrating Vue.js with PDF.js Express JavaScript PDF library

Welcome to PDF.js Express. This guide will help you integrate a free trial of PDF.js Express into VueJS applications on the browser. It will help you clone the Vue sample repository, walk through the project structure, and show you how to call other WebViewer API. Your free trial includes unlimited trial usage and support from solution engineers.

Get the Vue sample source code here


Node.js is not required for PDF.js Express
PDF.js Express does not require Node, npm, or node_modules. It is only recommended to run the samples.
No trial license key required.
The trial of PDF.js Express SDK works without a license key. A commercial license key is required for use in a production environment. Please purchase a license key if you do not have one.

Initial setup

  1. Clone the pdfjs-express-vue-sample repository:

    git clone
  2. Enter the directory and run npm install:

    cd pdfjs-express-vue-sample
    npm install

    This will automatically download and extract the PDF.js Express Package.

You are now ready to run the sample or use more WebViewer APIs.

Sample overview

After initial setup, the pdfjs-express-vue-sample directory should be laid out like this:

├── package.json
├── package-lock.json
├── babel.config.js
├── node_modules
│   ├── ...
├── public  
│   ├── lib
│   │    ├── ...
│   ├── index.html
│   └── favicon.ico
└── src
    ├── assets
    │   ├── ...
    ├── components
    │   └── WebViewer.vue
    ├── App.vue
    └── main.js

Notable files and directories include:

File/Folder Description
LICENSE Lists the copyright and license information.
package.json Lists the manifest of the project and contains the author/version metadata.
public Contains the static index.html page that is loaded onto the browser and all other resources for the VueJS project including the icon. This is also where the PDF.js Express Webviewer lib is extracted to when you run npm install.
src Contains all the JavaScript files and assets for the VueJS project
src/App.js Contains the App component which imports the WebViewer.vue component, adds styling and places it on the HTML page using a <div> tag.
src/components/WebViewer.vue This is where the PDF.js Express WebViewer API calls are placed once the component is mounted.

Run the sample

  1. Run the application by executing:

    npm run serve

    Then open a browser and go to localhost:8080 to see the application.

    Your app should look like this:

    Vue WebViewer Sample

    Note: If your browser does not open automatically to open the WebViewer, navigate to localhost:8080 to see the project.

Use more WebViewer APIs

To call more WebViewer APIs, open /www/js/index.js in your favorite text editor and add the API calls to the callback for the WebViewer instantiation:

export default {
  name: 'WebViewer',
  props: {
    path: String,
    url: String
  mounted: () => {
      path: this.path,
      initialDoc: this.url, // replace with your own PDF file
    }, this.$refs.viewer).then((instance) => {
      // at this point, the viewer is 'ready'
      // call methods from instance, docViewer and annotManager as needed

      this.docViewer = instance.docViewer;
      this.annotManager = instance.annotManager;

      // you can also access major namespaces from the instance as follows:
      // const Tools = instance.Tools;
      // const Annotations = instance.Annotations;

      // now you can access APIs through `this.instance`

      // or listen to events from the viewer element
      this.docViewer.on('documentLoaded', () => {
         // call methods relating to the loaded document

For example, if you want to change the theme of the WebViewer to dark mode, you would add the following:


Execute npm run serve again and the theme of the viewer will change.

Vue Sample Dark

Next step

Guides Samples API docs