Although Minecraft's Java and Bedrock Editions are quite different, it's still possible to convert an existing Java world to Bedrock if you don't mind there being some differences to the world ...

Importantly, Minecraft Java mods tend to be free, while Bedrock add-ons can be either free or paid downloads in the Minecraft Marketplace.

If you want to convert Minecraft Bedrock world to Java and enjoy the host of mods, shaders, and texture packs, you're in luck.

As of today, the cross-platform version Minecraft Bedrock has launched "add-ons" through its in-game marketplace which, yes, are essentially also mods, free and paid.

Minecraft: Java Edition is the original version of the game for computers, while Bedrock is a newer version available on nearly every device.