FoamFix
by asie
Players with large modpacks who notice heavy memory use can install FoamFix, which applies a set of targeted optimizations to modded Minecraft.
What it does
FoamFix targets memory use and a handful of performance hotspots that appear once many mods are loaded. Its changes are narrow by design: each one addresses a specific part of the game rather than replacing core systems. Other, smaller optimizations are also included, and the foamfix.cfg file lists every option.
Files exist for Fabric and Forge across the 1.7.10 – 1.14 range, with the newest Fabric build, 0.12.1, covering 1.14. Either side can run it, and neither needs it. The mod is not open source; it is released under a custom license, and the source code and issue tracker are public.
Key features
Targeted memory optimizations
Reduces memory overhead in areas that grow heavy in large modded installations.
Adjustable options
Individual optimizations can be switched on or off in foamfix.cfg to isolate their effect.
Minor performance changes
Smaller fixes address less visible parts of the game, which the config file documents one by one.
Known incompatibilities
The author lists mods that FoamFix does not support, so their interactions are not covered.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Large modpacks
Packs with many mods are the setting the optimizations were written for.
Who it’s for: Players and server owners running heavily modded Minecraft on versions 1.7.10 – 1.14 who want lower memory use from targeted changes.
How it compares
NormalASM is a Forge-only mod for 1.12.2 that runs on client and server, and it is open source under the GNU Lesser General Public License v2.1 only. Memory Leak Fix covers Fabric, Forge and Quilt for 1.14.4 – 1.20.4, with the same optional environment and open-source license. Dypsis is a client-side only Forge mod for 1.12.2, licensed under the GNU Lesser General Public License v3.0 only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| FoamFix | Fabric and Forge | 1.7.10 – 1.14 | Client or server, optional | 2023-11-10 |
| NormalASM | Forge | 1.12.2 | Client and server | 2022-08-23 |
| Memory Leak Fix | Fabric, Forge and Quilt | 1.14.4 – 1.20.4 | Client or server, optional | 2024-01-06 |
| Dypsis | Forge | 1.12.2 | Client-side only | 2025-07-29 |
Questions
Does FoamFix need to be installed on the server?
Can FoamFix be used with every mod?
What should a player check if a bug appears with FoamFix installed?
In the catalog
FoamFix is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 926 mods support Minecraft 1.14.
More from asie
Similar mods
What the author says
FoamFix is a mod designed to optimize certain aspects of a modded Minecraft experience using simple, targeted optimizations. There are also other, more minor optimizations, but they will probably not have a significant impact on your gameplay directly. Check your foamfix.cfg file for a complete list!
Official listing
- Modrinth page
- modrinth.com/mod/foamfix
- Owner
- asie
- Published
- 2021-11-12
- Updated on Modrinth
- 2023-11-10
- Facts verified
- 2026-10-15