Leveling Adjustment is a mod that helps level up your characters in a very fast way. This is useful for those who play with a lot of monsters and other players. It will level up your character very quickly and allow you to reach the highest levels of the game. The way it works is by automatically calculating the exp for each skill, so you won't have to do any work. The only thing you need to do is set the exp factor for each skill, which you can do in the config.json file. The new gained experience is calculated as follows:

The mod works on the latest version of SMAPI.