Once you’ve downloaded the Platform Tools package, extract the contents of the .zip file to a folder you can find later (like “C:\Android\platform-tools”).

Use this tutorial to learn how to install new fonts on both rooted and unrooted Android devices via GO Launcher Ex, iFont and Font Installer.

You can get the platform tools for Windows, Linux, or Mac direct from Google's servers. You get a ZIP file containing the platform tools folder with ADB, fastboot, and a few other tools.