FPS Optimizer
Java mod listed for Minecraft 1.20–1.21. Download on the author's site.
⬇ Download on CurseForge
In short, this mod is meant to reduce the impact on your computer (cpu/gpu) when you're idle, by reducing your FPS to a custom value (see screens).
This mod has no bloat and is as minimalistic/optimized as possible. It uses the vanilla field without modifying its structure, avoiding conflicts with other mods since it's doesnt use mixins to edit the field, which is also more lightweight.
It's meant to be compatible, lightweight, simple, straight-forward, and useful:) - I originally made this mod for my personal use. Keep in my mind that
⚠️This mod does not give you more fps in the game⚠️
Default message (configurable) when idle, reducing FPS to 15.

You can configure in the mod's configuration:
- Default FPS: The fps set when you're not idle
- Idle FPS: The fps set when you're idle
- AFK timeout: After how many seconds you're considered as idle
- Show Idle Msg: If you want to show the message (basically enable the mod)
- Idle Message: What message you want it to be (%s for the amount of seconds)
- Dark background: If you want a dark background behind the message
Neoforge 1.21.1 config screen:
(there may be some differences between neoforge/forge GUI due to the different way they handle it..)
(You can access the config on main menu: "mod/fpsoptimizer/config")
This mod support English (en_US.lang) and french (fr_FR.lang) translations.
Feel free to help me with the translations by making an issue or a Merge Request on github!
Feel free to add this in any modpack published on curseforge! This is highly appreciated. I will maintain the mod when needed.
The source code is available on github: https://github.com/AwesomeHippo/FpsOptimizer (MIT license)
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.20.2, 1.20.5
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
FPS Optimizer is a free Minecraft Java mod. Compatible with Minecraft 1.21.1, 1.20.2, 1.20.5, 1.20.3 and newer. Downloaded 67,890 times (via CurseForge). Download it and open it directly in the game.



