Will changing version delete my progress or keep the same map?

Changing your Minecraft version swaps the server software, not your world. Your map, builds, and data stay right where they are. The one thing to watch is downgrading, which can be rough on a world that was saved on a newer version.

What a version change actually touches

The Versions tab reinstalls the server software while leaving your world and config files intact. Your map simply loads on the new version, as long as it's compatible.

Keeping your progress safe

The Versions tab reinstalls the software while leaving your world and config files in place.
Your map loads on the new version as long as it's compatible.
Take a backup first — via Files or SFTP — so you can revert if a plugin or mod isn't ready for the new version.

Warning: Upgrading is usually smooth, but downgrading a world to an older version can corrupt it. Back up before downgrading especially.

Frequently asked questions

Will I lose my builds? No — the world is untouched by a version change.

Will my plugins stop working? They may need updating to match the new version, but your world data is safe regardless.