Render Toggle

When rendering is turned off, the game stops drawing the world and leaves the interface on screen, so the frame rate can rise sharply on weak hardware. The toggle is bound to F9 by default, and the key can be changed in the controls menu. The state is saved between sessions, so the game starts the way the player left it. Files are published for Fabric, for 12 release versions 1.21 – 1.21.11, with 1.1.0 for 1.21.11 as the latest file.

Render Toggle is a client-side only mod, so only the player's game needs it and a server can run without it. It is released under the MIT License and is open source, with public source code and an issue tracker on GitHub. The author notes that the mod supports English and Russian languages. Because the mod is listed under Technology with Game mechanics as a secondary category, it sits among the tools for controlling how the game runs rather than among content additions.