LeftRightAutoClick

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What it does

A tiny client-side Fabric mod for Minecraft Java 26.2. Hold the left button to keep attacking, hold the right button to keep using / placing / interacting — at a speed you choose. Every option is configurable in-game and takes effect immediately, no restart required.

The mod never touches game state and never sends custom packets. It only feeds extra key press events into the vanilla input pipeline, exactly like a very fast physical mouse press would.

Features

• Auto attack — hold left click to keep swinging, respecting the weapon's attack cooldown.

• Auto use — hold right click to keep placing, planting, interacting or using items.

• Independent left / right toggles and independent hold thresholds for each button.

• Adjustable click speed (CPS) for both buttons, 1–20 per second.

• Creative mode fast left click — in Creative, hold left to click up to 20 times per second without waiting for the attack cooldown. Can be turned off.

• Smart item classification — bows, shields, food and other charge-or-hold items are never spammed; seeds and other placeable items always are.

• Offhand friendly — holding a shield in your offhand does not stop your main hand from auto-clicking.

• Everything is optional — every feature has its own switch.

Requirements

This is a client-side only mod (environment: client). It is ignored on a dedicated server, so the server does not need it.

Without Mod Menu, you can still open the settings: bind "Open LeftRightAutoClick settings" under Options → Controls → Misc. (The settings screen itself needs Cloth Config API.)

Settings

Open via Mod Menu → LeftRightAutoClick → config button.

A "Restore defaults" button sits in the bottom row between Cancel and Done.

All settings are saved to config/leftrightautoclick.json (delete the file to reset) and apply the moment you change them.

How it behaves

Left button

• Looking at a block is never interfered with — vanilla mining keeps working as usual.

• Looking at an entity with a weapon or an empty hand is what triggers auto-attacking.

• Pure weapons are weapons with no tool effect: sword, spear, mace, trident. An axe is not a pure weapon because it also works as a tool, so it does fast-click in Creative.

Right button

• Not touched (charge / hold items): bow, crossbow, trident, shield, spyglass, food, potions, milk bucket, honey bottle, ominous bottle, brush, carrot on a stick, warped fungus on a stick.

• Not touched (one-shot items): fishing rod, totem of undying, filled map, book and quill, written book.

• Auto-clicked: everything else — placing blocks, flint and steel, shears, buckets, buttons / levers / doors / trapdoors, redstone components, beds, bells, campfires, composters, containers, throwables, planting crops and seeds, and empty-hand interaction.

Item classification is based on the item's use animation and item tags first, so items added by other mods are handled sensibly too.

Two hands

The mod only looks at the hand vanilla would actually use: main hand if it is not empty, otherwise the offhand.

Good to know

• Server friendly, but check the rules. The mod stays on your client and adds no packets, but any auto-clicker can still trip anti-cheat systems. Follow the rules of the server you play on.

• Requires Java 25 (Minecraft 26.2 requirement) if you build from source.

• License: MIT · Author: HAPPYCYQ

Install

Drop the jar into your client mods folder together with Fabric Loader and Fabric API (plus Mod Menu and Cloth Config API for the in-game settings screen). Remove older versions of this mod before installing a new one — two copies of the same mod will conflict.