Injecta is an open-source web tool for developers to make sure their pages are optimized. It will find all the JavaScript files on a webpage and allow you to customize them with your own code.

This project was designed for web developers and mobile app developers and it is being used by almost a hundred organizations in the world, including Google, Yahoo, Facebook, Twitter, and Medium.

Since this is a developer tool, you can use it without limitations. However, this is not a perfect tool for website performance, which we will be improving in future releases.

In order to help you, you can use the performance options, which will be covered in the next sections.