Design, debug, and test APIs locally or in the cloud

Playwright enables reliable end-to-end testing for modern web apps.

Easy on-device screenshot testing for Android.

An open source JS tool for image analysis and comparison. A successor of PhantomCSS.

Cloud-scale performance testing. Effortless load testing and synthetic checks at scale. Cloud-native and open-source. The next evolution of performance testing.

Burp or Burp Suite is a set of tools used for penetration testing of web applications. It is developed by a company named Portswigger who make freely available a Web Security Academy which has a range of lessons on penetration testing.