Apache JMeter

Apache JMeter is an open-source tool used for testing how well websites and web applications perform under different levels of user activity. It simulates multiple users accessing a service simultaneously to identify how it responds under load, helping developers find potential bottlenecks or failures. JMeter can test various protocols, like HTTP, HTTPS, and FTP, providing insights into server performance, speed, and stability. It is widely used by quality assurance teams to ensure digital services are reliable and efficient before they go live.