Minecraft wiki entry for Creating_a_data_pack, associated text: If you don't see your pack in the list, make sure your pack.mcmeta file is correct and saved. Look for any missing curly brackets {}, commas ,, colons :, quotation marks "", or square brackets []. Remember that for each open brace, quotation, or square bracket, you must have a closing bracket, quotation, or square brackets. If you still don't see your pack, make sure it's in the right folder.