Converting a file to an Minecraft Bedrock Edition is often as simple as changing the file extension itself
No Nested Folders: The contents (like manifest.json, textures, etc.) must be at the top level of the ZIP, not tucked inside a subfolder. how to convert zip to mcpack
If renaming doesn't work, the internal folder structure might be incorrect (e.g., the files are buried inside a sub-folder). Extract the ZIP : Right-click the file and select Converting a file to an Minecraft Bedrock Edition
Confirm: A warning will appear asking if you are sure you want to change the extension. Click Yes. Method 2: Using Online Converters (No Software Install)
If you are unable to rename files on your device (common on some school or work computers) or the rename method fails, you can use an online converter.