course downloader (Discontinued)

This script will download course for you from It uses NodeJS, TypeScript and your login credentials.

Important: Project Discontinued

Are you familiar with They provide interactive courses for software developers. One of their famous course is Grokking the system design interview. Course authors are software engineer of large companies like Google, Amazon, Microsoft, Databricks etc. So you know, this course is not authored by some average software engineers. In this course you will learn how Twitter, Uber, Dropbox etc systems are designed.

Recently I have got a subscription of and started to explore their courses. Then, one thing came to my mind. What if my subscription ends? These are not videos that I can download and watch later. So, I have to download it somehow to read it later. That is when I started to write a simple script which would do the downloading for me.

How it works?

  • Opens a headless browser.
  • Login using your given credentials. (If not already logged in)
  • Go to the course page and fetch all the lesson's link.
  • Go to lesson link and take a full page screenshot.
  • Save the screenshot.


  • TypeScript
  • NodeJS
  • subscription

How to use?

Instructions are given in to the repository but for the sake of this article here we go again. Here is the GitHub repository link.

  • Clone the project first. Then navigate to the project directory.
  • Run npm run compile to compile TypeScript to plain JavaScript.
  • Run npm install to install required dependencies.
  • Open config/default.json file in a test editor and put your email, password and course URLs that you want to download.
  • Finally run, npm start.

Now the script should start downloading the course and save it to downloads/{COURSE_TITLE} directory. Each lessons are number by their order.


This script is written in a couple of hours and there are a lot of things to improve. Feel free to create PR, issue etc.

Thank you for reading.