POSTMAN can be installed wither as a native software in your local machine or it can be added as a chrome extension. The POSTMAN software is available for different Operating systems, such as Windows, MAC, and Linux.
In this section, I will show you, how to install POSTMAN as Native software or as a chrome extension in an Windows OS.
Visit the link: https://www.getpostman.com/downloads/
There is an option for selecting two Operating System. (32 bit or 64 bit OS). If you are running 64-bit Windows then click on the 64-bit option the software will start downloading.
Once the software is downloaded, go to software, right-click and start installing.