World corruption can cause a server to crash, not start at all or prevent a world from loading. If you already have a world backup, we recommend restoring your existing backup instead of proceeding with this tutorial. Otherwise, if you would prefer to fix your existing world then you can use a chunk manipulation tool like the MCE Editor to delete corrupted chunks from your world.
# Using the Minecraft Region Fixer Tool
The Minecraft Region Fixer tool will automatically delete any corrupted chunks it detects and regenerate them using the same seed data.
- Generate a backup for your world by following this guide
- Download your world to your computer is you haven't already
- Download and install Python 3 from this page
- Download the latest Minecraft Region Fixer release ZIP file
- Unzip the downloaded Region Fixer zip file
- Press
WIN+Ron your keyboard to open the windows run menu - Enter
powershellto open Windows Powershell
- Copy the path of the unzipped tool folder, then enter
cd <COPIED PATH>into the Powershell window - Copy the path for the affected world folder, then enter the command
py regionfixer.py -p 4 --delete-corrupted <PATH>into Powershell - You can now re-upload the modified world to your server, remember to delete the old corrupted world
# Additional Options
If completing this steps does not fully resolve your issue, we recommend trying a few more things.
- Use a tool like MCA Selector to select and delete corrupted chunks in your world file.
- Delete the
level.datfile in your world folder, then restart your server to test if the issue is resolved. - Delete the
playerdatafolder in your world folder, then restart your server to test if the issue is resolved. - Delete the
datafolder in your world folder, then restart your server to test if the issue is resolved.
If none of these options resolve your world corruption issue, your best option, unfortunately, may be to simply generate a new world.
