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Render Pdf with Pdf.Js Viewer in PyQt: A Step-by-Step Guide

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PDF is one of the most widely used file formats for sharing documents on the web. However, rendering a PDF file in a website or application can be a bit tricky. Luckily, PyQt provides a solution: Pdf.Js Viewer. In this step-by-step guide, we will walk you through how to render PDF using Pdf.Js Viewer in PyQt.If you are looking for an effective and efficient way to render PDF files within your PyQt application, then this guide is for you. With Pdf.Js Viewer, you can easily display PDF files in your user interface, giving your users a seamless experience.Our guide will take you through each step of the process, from installing the necessary libraries to actually displaying the PDF file in your PyQt application. We will provide clear and concise instructions that even beginners can follow.So, whether you’re a seasoned PyQt developer or just starting out, this guide will help you add Pdf.Js Viewer to your projects and render PDF files with ease. Follow along with our guide and take your PyQt applications to the next level.

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“How To Render Pdf Using Pdf.Js Viewer In Pyqt?” ~ bbaz

Render Pdf with Pdf.Js Viewer in PyQt: A Step-by-Step Guide


When it comes to rendering PDF documents in a PyQt application, developers have a few options to choose from. One popular option is using the Pdf.Js Viewer, an open-source JavaScript library for rendering PDFs directly in a web browser. While this library was originally designed for use in web applications, it can also be used in desktop applications built in PyQt. In this article, we’ll cover everything you need to know to get started with rendering PDFs using Pdf.Js Viewer in PyQt.

Setting Up Your Development Environment

Before we dive into the actual code, there are a few prerequisites you’ll need to have in place. First, you’ll need to have PyQt installed on your development machine. If you don’t already have it installed, you can download it from the official website or install it via pip. You’ll also need to have the Pdf.Js Viewer files downloaded and available in your PyQt project directory.

Downloading the Pdf.Js Viewer Files

To download the Pdf.Js Viewer files, simply visit the official repository on GitHub and download the latest release. Then, extract the contents of the zip file to a directory in your PyQt project.

Adding the Pdf.Js Viewer Files to Your Project

Once you’ve downloaded the Pdf.Js Viewer files, you’ll need to add them to your PyQt project. In this example, we’ll assume that you have created a pdf_viewer directory in the root of your project for storing the Pdf.Js Viewer files.

Creating the PyQt Application

Now that we have our development environment set up, it’s time to create our PyQt application. In this example, we’ll create a simple window that displays a PDF file using the Pdf.Js Viewer.

Creating the Main Window

To create the main window for our application, we’ll use PyQt’s QMainWindow class. In this example, we’ll create a window that is 800 pixels wide by 600 pixels tall:

Loading the PDF File

Before we can display the PDF file in our application, we need to load it into the Pdf.Js Viewer. To do this, we’ll use PyQt’s QWebEngineView class to load the PDF file into a web page:

Displaying the PDF File

Now that we have loaded the PDF file into the Pdf.Js Viewer, it’s time to display it in our PyQt application. To do this, we’ll create a layout for our main window and add the QWebEngineView widget to it:

Comparing Render PDF with Pdf.Js Viewer in PyQt with Other Options

Now that we have seen how to render a PDF with Pdf.Js Viewer in PyQt, let’s compare this approach with some other options available to us as developers.

Using Qt PDF Tools

One option for rendering PDFs in PyQt is to use Qt’s built-in PDF tools. While this approach can work well for simple documents, it may not be suitable for more complex documents or those with advanced formatting.

Using a Commercial PDF Library

Another option is to use a commercial PDF library, such as Adobe Acrobat or iText. These libraries can offer more advanced features and better compatibility with different PDF formats, but they come at a cost and may not be feasible for all projects.

Advantages of Using Pdf.Js Viewer in PyQt

Compared to these other options, using Pdf.Js Viewer in PyQt offers several advantages. First, it is a free and open-source library that can be easily integrated into your PyQt application. It also offers good compatibility with different PDF formats and advanced features, such as text selection and search.


In this article, we’ve covered everything you need to know to get started with rendering PDFs using Pdf.Js Viewer in PyQt. We’ve seen how to set up your development environment, create a PyQt application, and compare this approach with other options available to developers. With this knowledge, you should be well on your way to building powerful desktop applications that can render PDF documents with ease.

Thank you for taking the time to read through our step-by-step guide on how to render PDFs with the Pdf.Js Viewer in PyQt. We hope that this tutorial has been informative and easy to follow.

By using the Pdf.Js Viewer in PyQt, you can create a seamless experience for your users when they need to view PDFs within your application. This can be especially useful for businesses that deal with large amounts of documentation or need to provide their clients with PDFs for review.

If you have any questions or suggestions on how to improve this guide, please don’t hesitate to reach out to us. We’re always looking to improve our content and make it as helpful as possible.

Again, thank you for visiting our blog and we look forward to providing you with more valuable content in the future!

When it comes to rendering PDF files with Pdf.Js Viewer in PyQt, there may be a lot of questions that come to mind. Here are some frequently asked questions and their answers:

  1. What is Pdf.Js viewer?

    Pdf.Js viewer is an open-source JavaScript library that allows for the rendering of PDF files directly in a web browser.

  2. What is PyQt?

    PyQt is a set of Python bindings for the Qt application framework and runs on all platforms supported by Qt including Windows, OS X, Linux, iOS, and Android.

  3. Can Pdf.Js viewer be used with PyQt?

    Yes, Pdf.Js viewer can be used with PyQt to render PDF files.

  4. What are the steps to render PDF files with Pdf.Js Viewer in PyQt?

    The steps include:

    • Installing PyQt and Pdf.Js Viewer
    • Creating a PyQt application
    • Embedding the Pdf.Js Viewer in the PyQt application
    • Loading and rendering a PDF file
  5. Is Pdf.Js Viewer compatible with all versions of PyQt?

    Pdf.Js Viewer is compatible with PyQt4 and PyQt5.

  6. Are there any limitations to rendering PDF files with Pdf.Js Viewer in PyQt?

    One limitation is that Pdf.Js Viewer may not render all PDF files accurately, especially those with complex formatting or embedded fonts.