Simple autoclicker: Automatically right-click and/or left-click.
Supported versions of Minecraft: 1.12, 1.16, 1.17, 1.18, 1.19.
Available toggles (all key bindings are configurable):
Auto-click left mouse button (default toggle key H): When enabled, clicks the left mouse button every game tick.
Smart attack (default toggle key V): Same as auto-click left mouse button, but waits until the attack cooldown is recharged before attacking again.
Auto-click right mouse button (default toggle key G): When enabled, clicks the right mouse button every game tick.
Change auto-click interval (default toggle key N, from v2.2.0): Changes the number of ticks (by default 1-10) between every automatic right or left click.
Some toggles can be combined, test them out to find which.
From v2.4.0, the auto-click interval's minimum, maximum and step values can be changed in the config file of the mod.
For example, you could now set the minimum to 5 ticks, the maximum to 100 ticks (5 seconds) and the step to 5 ticks. Every click to change the interval would raise it by 5 ticks.
NOTE: This mod is client-side only. Earlier versions of the mod forcibly quit the game if installed on a server, later versions silently ignore, but it's still better not to install on the server.
Support for Minecraft 1.8 and lower has ended, and those versions are no longer updated.
Contact me through GitHub, it's most likely I'll see your message there.
This mod is free software, licensed under the GNU LGPLv3.