How I used Grinder for load testing my web application? I started this exercise by downloading Grinder from its home URL as http://grinder.sourceforge.net I have used Grinder version 3.0-beta32, and of course unzipped it to find many JAR files and an examples folder with a properties file grinder.properties and some Python files (with extension as py). From the default configuration for the grinder.properties grinder.script=helloworld.py I commented this and uncommented following line: grinder.script=http.py In http.py file, URL to be load tested is changed to http://localhost To run default load tester for HTTP based web application, I moved my command prompt to the examples folder, and executed following command java -cp ../lib/grinder.jar net.grinder.Grinder After running complete load test, some of the data and output and error files can be found under example/log folder. I personally found this utility/tool Grinder as very handy and easy to configure and instantly ready for use to load test many types of applications. Note: Please refer appropriate license and documentation before use