Ready for your server: Memory Leak Fix has versions for Fabric and Forge. Create your world with one of those loaders and a version from the table below. The newest option is Forge on Minecraft 1.20.4.
What Memory Leak Fix does
A mod that fixes random memory leaks for both the client and server
lithium-fabric - The best general performance mod - FerriteCore - Memory usage optimizations
- Author
- FX
- Categories
- optimization
- Loaders
- Fabric and Forge
- Minecraft versions
- 1.20.4, 1.20.3, 1.20.2 and 22 more (oldest: 1.14.4)
- Latest version
- v1.1.5 (Forge, January 6, 2024)
- Downloads
- 38,668,444
- License
- LGPL 2.1 only
Which Minecraft version and loader it works with
Every world has its own Minecraft version and loader (vanilla, Fabric, Forge or NeoForge).
To play with Memory Leak Fix, create your world with any of these combos:
| Loader | Newest | Minecraft versions |
|---|---|---|
| Fabric | 1.20.4 | 1.20.4, 1.20.3, 1.20.2 and 22 more (oldest: 1.14.4) |
| Forge | 1.20.4 | 1.20.4, 1.20.3, 1.20.2 and 19 more (oldest: 1.15.2) |
Does it go on the server or on players' games?
Memory Leak Fix works on the server, on players' games or both: each side gets its perks and nobody gets locked out for not having it.
| Where | Per Modrinth |
|---|---|
| Server | optional |
| Players | optional |
| What the panel suggests | Server and players |
What other mods it needs
None: its latest version doesn't require any other mods on Modrinth.
How to add Memory Leak Fix to your server
- Open the panel and create a world with a compatible loader and Minecraft version (Fabric and Forge, per the table above), or open one you already have.
- In the world's "Mods" section, search for Memory Leak Fix in the Modrinth catalog. You'll only see what works with your world.
- Add it with the "Server and players" option, the one the panel suggests for this mod.
- Start or restart the server so it installs.
- Ask your friends to download the .mrpack modpack from the panel again.
Not sure about client vs. server mods? Read the modded server guide. What each size costs is on the pricing page. Prices in Mexican pesos (MXN).
Frequently asked questions
Which loader and Minecraft version does Memory Leak Fix work with?
Memory Leak Fix has versions for Fabric: 1.14.4 to 1.20.4 (25 versions); Forge: 1.15.2 to 1.20.4 (22 versions). You pick the loader and version when you create your world; the newest option is Forge on Minecraft 1.20.4. The panel's catalog only shows Memory Leak Fix if it has a version for your world.
Do players have to install Memory Leak Fix?
Memory Leak Fix works on the server, on players' games or both: each side gets its perks and nobody gets locked out for not having it.
What other mods does Memory Leak Fix need?
Its latest version (Forge) doesn't require any other mods on Modrinth: just add Memory Leak Fix and you're set.
Does adding Memory Leak Fix cost extra?
No. Mods are free; you pay based on server size and the hours it's on. A Small server with 10 hours a week comes to about $117.10 MXN a month. If you stack lots of mods, a bigger size might suit you better.
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Build your server with Memory Leak Fix
Create your Minecraft server, add any mods you like and pay only for the hours you play.
Modrinth data updated October 19, 2026.