What is JMeter?
JMeter is an application that can be used to test the performance of certain websites. It is a tool that helps people to understand how their websites are performing from the user’s perspective. Jmeter supports recording tests, reporting and provides a CLI(Command Line Interface). JMeter can also be used for load testing.

Pre-requisites

Check java is installed on your machine by typing the below command on your terminal.

java -v

Expect to see a response similar to this one

$ java -version
java version "1.8.0_291"
Java(TM) SE Runtime Environment (build 1.8.0_291-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.291-b10, mixed mode)

How to install JMeter on windows

1. Download JMeter zip/tgz file from the official download site. 
2. Install Java JRE ( Java Runtime Environment) from the official Java site. 
3. Extract the zip file and move the extracted JMeter directory into your local bin directory(the bin directory can be a subdirectory of a folder where you want to keep all of your executables). 
4. Go to Start > Run and type cmd in the input box without leaving quotes, then press enter or OK.(In 64-bit system or any similar OS, please type cmd or command instead of cmd in Start > Run.

The Installation Process for JMeter on Mac OS.

Ensure you have homebrew installed: If not, run the following in your terminal to install it.

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Now that you have homebrew, run the following.

brew install jmeter

When the installation is complete, type the command below to validate the installation.

jmeter -v

Confirm Jmeter is installed

As you can see, I am running JMeter 5.4.1 – this may vary for you, depending on when you are installing JMeter

Run it!

When you run Jmeter by typing jmeter on the terminal(macOS) – Jmeter will start running – as can be seen on the image on the left.

Congratulations! You now have Jmeter up and running!