Coding an Extension that Summarises Web Pages with HTML, CSS, and JS

In this post, I will show you how you can create a Google Chrome extension that instantly summarises the current web page. We are going to build TLDR Master, a minimal, privacy-friendly extension that runs entirely in your browser.

The best part? No API keys or external services are required. We will write a lightweight TF-IDF algorithm in pure JavaScript to extract the most important sentences from any article.

Creating the project

First, let's set up our project structure. Create a new folder named TLDR-Master and add the following files:

TLDR-Master