How to Convert a Minecraft World from Java to Windows 10 Edition

Looking to make the switch to Bedrock?

Or maybe you downloaded a Java world but don't actually own Java edition? (So many classic worlds you can't miss out on!)

We'll walk you through the surprisingly simple process of converting your world from Java to Bedrock using the Universal Minecraft Tool.


Table of Contents:

Don't Ruin Your World - Use the UMT

Did you know that when Minecraft updates, only the parts of your world you visit will actually be updated? This can be a problem for converters.

For example, in the 1.18 Caves and Cliffs update the world height was expanded (0 to 255 became -64 to 320).

So, if your world was played on anything before 1.18 at any point and was also played on or after 1.18 at any point, then only those recently visited chunks have the new world height.

After conversion, all the pre-1.18 chunks will become empty under Y:0 where new terrain is supposed to be! Minecraft won't see anything wrong with that since it can't tell the difference between a converted chunk and one you might have just dug out by hand.


Only the Universal Minecraft Tool supports a feature called Allow Older Chunk Versions which detects scenarios like this and properly formats the output chunks to signal to Minecraft that the terrain needs to be updated.

For this reason alone, the Universal Minecraft Tool is the only proper tool for the job.

But there are other reasons too:

  • Unlimited world size (others limit you to 500MB)
  • Full item conversion (enchantments, written books, etc)
  • All entities and tile entities are supported
  • Proto chunk skipping (others leave gaping holes in your world)
  • Terrain blending flags (others ignore this)
  • Snapshot support
  • 2D and 3D biome conversion
  • Full product support with a guarantee

And so many more!

Step 1: Open the Input Java World

To begin, you'll need to tell to the UMT which world you're trying to convert.

Follow this guide to Open a Java World in the Universal Minecraft Tool

Step 2: Select Bedrock as the Output Edition

Click Bedrock to select it as the target output edition.


You'll notice a drop-down menu for selecting different target versions. This can be useful if you're trying to get more advanced with your world conversion, but for most cases you'll want to leave it on the latest version.

Click Next to continue.

Step 3: Conversion Options

This panel allows you to control certain technical aspects of how the conversion should run. Thankfully, for Java to Bedrock conversion you'll usually want to leave these at their default values.


Two very important settings you'll likely want to keep enabled are the Skip Partially-Generated Chunks and Allow Older Chunk Versions features. Both are crucial to ensuring you don't have any holes or empty spots in your world (as we mentioned earlier).

One Important Exception

If you are converting a flatland world created on or after 1.18 to a version before 1.18, then you'll want to set the Depth Fixer conversion option to Raise.

This will raise your world up by 64 blocks ensuring the bottom of your world is repositioned from Y:-64 to Y:0.

Step 4: Convert

It's the big moment!

Click Start Conversion to begin.


The UMT will now scan the input world and perform all the necessary conversion steps to create a super-accurate clone of your world for Bedrock edition.

Step 5: Save the Bedrock World

After conversion, pick a spot to save the output world.

Click Save World to bring up the save window.


Enter a name for the world, and click Save.



Congratulations! You've successfully converted the world.

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