Apache JMeter is an open-source load testing tool designed to measure performance and functional behavior of applications. It is primarily a Java application that allows users to simulate heavy loads on various resources, including servers and networks. Originally created for web applications, JMeter has expanded its capabilities to test both static and dynamic resources, making it versatile for different testing scenarios. Users can analyze performance under various load types, enabling developers to optimize their applications effectively.

Targeting a wide range of users, including small businesses, enterprises, and government organizations, JMeter supports multiple integrations with tools such as Azure Marketplace, Prometheus, and LoadFocus. The application is available under a subscription-based license, ensuring users have access to its comprehensive features. With support primarily in English, JMeter is an essential tool for developers looking to enhance their applications' performance through rigorous load testing.