Regression testing is an essential process in the software development lifecycle, aiming to ensure that recent changes, like bug fixes or new features, do not adversely affect existing functionalities. This type of testing is vital for maintaining software quality, as even minor code changes can introduce new bugs. While manual regression testing is possible, it is often inefficient for large applications, making automated regression testing tools indispensable. These tools streamline the process by automating repetitive tasks, allowing testers to focus on more critical development aspects. The article discusses key considerations for selecting regression testing tools, such as integration with CI/CD pipelines, ease of use, and support for multiple platforms. It highlights popular tools like Selenium, Appium, and Katalon Studio, each offering unique features to cater to various testing needs. The use of these tools ensures a dependable process for early bug detection, contributing significantly to the development of high-quality software applications.