: Right-click your .zip file and select Rename .

: Windows will warn you that changing the extension might make the file unusable. Select Yes .

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.

To fix this, extract the ZIP, verify the structure, then recompress the contents (not the parent folder) into a new ZIP using standard settings. Then rename that new ZIP to .mcpack .

Converting a .zip file to a .mcpack is the standard way to install resource packs, behavior packs, or skins in Minecraft Bedrock Edition