Understanding the underlying code of Facebook can be useful for developers debugging their integrations or curious users looking for specific "hidden" data, like a profile ID How to View Facebook's Source Code
Note: A new browser tab will immediately open displaying a massive wall of text and code. 🔍 What Are You Actually Looking At?
If you are on a desktop browser (Chrome, Firefox, Safari, or Edge), accessing the source code for https://facebook.com is straightforward:
By using the "View Page Source" feature in your web browser, you can lift the hood and look directly at the raw HTML, CSS, and JavaScript powering the platform.
To view the source code of a webpage: