M-Mine

Mine a 3x3 area with any pickaxe. Turn it on and off with a key, and an outline shows you exactly which blocks will break.

Features

• 3x3 mining: break one block and the 8 around it break too, on the face you're mining: in front of you for walls, on the floor or ceiling when you look down or up.
• Toggle key: default ù (the \ key on US keyboards). You can change it in Controls → M-Mine.
• Outline: while M-Mine is on, the 3x3 area is highlighted so you know what you're about to mine.
• Enchantments work: Fortune, Silk Touch, Unbreaking and XP drops work on every block, just like normal mining.
• Fair durability: each block costs 1 durability, so a full 3x3 costs up to 9. If the pickaxe breaks halfway, mining stops.
• Sneak for precision: hold Shift to mine a single block.
• Safe: never breaks unbreakable blocks (like bedrock) or blocks your pickaxe can't harvest.

Requirements

• Minecraft 26.3
• Fabric Loader
• Fabric API

Install it on both client and server (in singleplayer, just put it in your mods folder).