TitleAPI.jar is a release file of the Minecraft plugin TitleAPI User Friendly, JSON Free, made for Minecraft 1.12. It was published on September 4, 2017 and is 0 MB in size. For the full description, screenshots and every other version, visit the TitleAPI User Friendly, JSON Free plugin page.
How to install: Put the .jar into the plugins folder of your Paper, Spigot or Bukkit server and restart the server.