Stop stop stop, don't close that page.
- Tested Minecraft Versions:
I know there are some plugins can do that, but, wait, let me explain.
FreeKB allows you to edit the knockback.
You can set knockback on ground and knockback on air.
Choose your private combo!
There aren't other thing to explain, seeing is believing
/kb <setvel/setheight> <air/ground> <value>
Edit the knockback in-game
FreeKb.command » Use the command