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Minecraft-Region-Fixer
Python script to fix some of the problems of the Minecraft save files (region files, *.mca).
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That said, there was a forum thread where they would fix corrupted worlds, though it is no longer actively monitored and I don't know of any general "corrupted save recovery" place; otherwise, there is a tool, Minecraft Region Fixer, which will fix corrupted chunks (updated through 1.18; not sure if it will work on 1.19 but I don't think it made any changes to the save format), but may not be able to fix every issue (e.g. issues with specific blocks or entities). Note that in either case there may be data loss when resetting corrupted chunks/deleting entities/etc (best case is that no player builds were affected).