Common Word Tag Script

[Joeni]

Hmm, I’ve not used it myself, but I believe this script does what you’re looking for:

[Userscript] WaniKani JLPT Indicator

This is a third-party script/app and is not created by the WaniKani team. By using this, you understand that it can stop working at any time or be discontinued indefinitely. Have you ever wondered which JLPT level a given vocab or kanji belongs to while learning or reviewing it? This script will give you an indicator in the upper left corner of the screen. Here are some examples of what it looks like: [14] [25] (it gives you just the lower box, not the upper one with “common” in it - that’s…

It seems to show both JLPT level and whether it’s common, pulled from Jisho.