Apache JMeter is an open-source tool that can be used for performance testing of the applications. JMeter is pure java application.
Official Website: https://jmeter.apache.org/
Download and Install
To download JMeter navigate to the download page. For Windows operating system, download the latest binary zip file on to the machine. Installing JMeter is simple. Extract the zip file to a favorable location on the hard drive on the computer.
For example C:\jmeter
On the Windows operating system, to run the JMeter tool in GUI mode, run the jmeter.bat file.