Create & collaborate A/B Test variations is a free Chrome extension developed by Abhishek Saha. This extension is designed to assist users in creating variations for A/B tests. It offers a convenient way to inject custom CSS and JavaScript into a website, allowing users to easily test different design and functionality options.

One of the standout features of this extension is its ability to remember all the tests created, making it effortless for users to review and manage their tests at a later time. Additionally, users can collaborate with others by sending a specific test variation to a friend or colleague for review.

The extension includes a JS and CSS editor, complete with a dark skin theme for comfortable coding. Error detection is also built-in, ensuring that any coding mistakes are promptly identified. The code is automatically saved, providing peace of mind and preventing any loss of progress.

For users with dual monitors, this extension is particularly useful. It allows users to have the website open on one monitor while coding the test on the other. The extension also offers an auto-refresh feature, automatically injecting any changes made into the browser.

With features such as full-screen and mini editors, auto-refresh, and error detection, Create & collaborate A/B Test variations is a valuable tool for anyone involved in A/B testing. Best of all, it is available for free, making it accessible to a wide range of users.