I use Minecraft Region Fixer to remove corrupt chunks or delete excessive entities. It's been a life saver.

I used MCEdit which fixed it somehow. My entire world crashed when I looked up a recipe in Not Enough Items, afterwards my world wouldn't even show up in Minecraft. Lost all my held items in the process though that was probably my fault.

MCEdit just isn't viable for me. My world is about 7gb and it's hosted online.

I had never used a world fixer before, so I jumped on the first tool I came across in the diagnosis.

7GB is a pretty big world given that it's vanilla Minecraft. I'm assuming that's probably from your MC server TreesTop. The biggest world (single player, mind you) I've had was a 1.47GB world with ~30ish mods installed.

Yep, that's my multiplayer server.

Do you ever do world resets on your server? Have all your players start over from scratch?

I did that in the past, but not with my current server. I like maintaining the history. It's fun to go back and look at builds from over a year ago.

I could see that. I like to zip up and save my worlds when I move on to a new world. Always kinda cool to go back and look at the structures and machinery.