Reaction Speed Test is a free Chrome add-on developed by YunD. As the name suggests, this program is designed to measure your reaction speed.

The test consists of a simple concept: you are presented with a red screen and you must wait for it to turn green before clicking. The goal is to click as quickly as possible once the color changes. This test can be a fun way to challenge yourself and see how fast your reflexes are.

Reaction Speed Test is a lightweight add-on that seamlessly integrates into your Chrome browser. It provides a quick and easy way to gauge your reaction time without any unnecessary distractions. Whether you're looking to improve your reflexes or simply curious about your reaction speed, this add-on is worth a try.