If you are using Java Edition, you do not usually need to rename the file. Instead, you move the .zip directly into the game's internal folders.

Double-click the new file. Minecraft will launch and automatically begin the import process. Manual Installation for Java Edition

In Minecraft , "mc.zip" typically refers to world, skin, or resource pack files that have been compressed into a standard ZIP archive but need to be converted to specific Minecraft file formats (like .mcworld or .mcpack ) to be automatically imported by the game.

Right-click your .zip file and select Rename .

Replace .zip at the end of the filename with .mcworld or .mcpack .

Most Bedrock Edition content is distributed in ZIP format for easier downloading, but the game recognizes specific extensions for automatic installation. Rename filename.zip to filename.mcworld .

In File Explorer, go to the View tab and check the box for File name extensions . Without this, you cannot change the actual file type.