Happy 1.17 release day!

• 1.17 Java <-> Bedrock support.
• Spawn Egg Item Conversion has been modified to be more reliable.
• Fixed a bug where inventories would contain air.
• Fixed a bug where flower pots could contain air with an invalid state.
• Fixed a bug where item frames could contain air with an invalid state.
• Fixed ItemFrame rotation between Bedrock -> Java.
• Region files which have no region data are now automatically skipped.

• Improved lever conversion
• Fixed a bug with NBT Strings

• Added formal Bedrock 1.16.210 Support
• Fixed an edge-case where the preview would cause errors when switching tabs
• Fixed a bug with drag and drop not working correctly
• Fixed logged-in names being rendered incorrectly when using UTF-8 characters
• Fixed an issue with loading Java 1.16.1 void worlds

• Added 1.16.5 Java compatibility
• Fixed an issue where ocean biomes would be incorrectly converted

• Added (formal) Bedrock 1.16.200.0 support
• Fixed the End being classified as the Nether for Java encoding
  
  

Added:

• Bedrock "Multiplayer Settings" are now modifiable in advanced mode

Fixed:

• Various mappings (1.8 flower pots, smooth stone double slabs)
• Speed improvements

Added:

• Initial support for non-minecraft: (custom) blocks
• Support for discarding empty chunks

New - Block Mappings!

Block mappings allow you to turn one block into another. Blocks which match the input will be turned into the output, states which are not set will also be converted where possible.

You can find Block Mappings under Advanced, after picking an export target. Block Mappings is currently in beta - whilst it has been tested exhaustively by our team, we're awaiting partner feedback and reports before it will leave beta.

New:

• After enabling Chunk Pruning in Advanced -> Dimensions/Pruning, you can now visually edit the chunk prune region on the map in World Preview.
• Explicit support for Bedrock 1.16.2, which fixes a few minor bugs for 1.16.2.