This tutorial will demonstrate how to install Tkinter on multiple platforms. Every platform has individual commands to install Tkinter in Python. Install Tkinter on Windows Tkinter offers multiple GUI libraries to develop GUI applications. The Tkinter is one of the popular libraries to build GUI system interfaces. To install Tkinter, we have to install Python; if it is already installed, we can move on to install Tkinter. When we start the installation of Python, we can check td or tk and IDLE Tkinter during installation.