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Memory Leak Fix

Name: Memory Leak Fix
Author: FX

A mod that fixes multiple memory leaks in Minecraft. Both server-side & client-side

For the best performance & memory usage, I recommend using this mod with:

lithium-fabric - The best general performance mod
FerriteCore - Memory usage optimizations

My other optimizations/fixes

MoreCulling - Changes how blockstate culling is handled to improve performance
Carpet-Fixes - Largest Server-Side bug fixing mod
Blanket - Client-side tweaks/fixes
RailOptimization - Make powered rails less laggy

Minecraft 1.20.5+

All the memory leaks in minecraft previously fixed by MemoryLeakFix have been fixed. Making this mod obsolete in future versions of the game.

More Info

Feel free to contribute to the project!
I'm also fine if you use this mod in your modpacks, just make sure to mention it.

However I don't allow clients or other projects to merge this mod without permission, if you would like to use this mod in your client or another project please contact me.

All Versions

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Game Version

Mod Loader

Release Channel

Name	Game version	Platforms	Published	Downloads	Actions
R MemoryLeakFix 1.1.5 [forge,1.17+]	1.20.x 1.19.x 1.18.x +1	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.5 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.5 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.5 [fabric,1.17+]	1.20.x 1.19.x 1.18.x +1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.4 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.4 [fabric,1.17+]	1.20.x 1.19.x 1.18.x +1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.4 [forge,1.17+]	1.20.x 1.19.x 1.18.x +1	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.4 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.3 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.3 [forge,1.17+]	1.20.x 1.19.x 1.18.x +1	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.3 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.3 [fabric,1.17+]	1.20.x 1.19.x 1.18.x +1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.2 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.2 [forge,1.17+]	1.20.x 1.19.x 1.18.x +1	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.2 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.2 [fabric,1.17+]	1.20.x 1.19.x 1.18.x +1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.1 [fabric,1.17+]	1.20.x 1.19.x 1.18.x +1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.1 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.1 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.1 [forge,1.17+]	1.20 1.19.x 1.18.x +1	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.0 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.0 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.0 [forge,1.17+]	1.20 1.19.x 1.18.x +1	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.1.0 [fabric,1.17+]	1.20 1.19.x 1.18.x +1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.0.0 [forge,1.17+]	1.19.x 1.18.x 1.17.x	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.0.0 [fabric,1.14.4-1.16.5]	1.16.x 1.15.x 1.14.4	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.0.0 [forge,1.15.2-1.16.5]	1.16.x 1.15.2	Forge	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix 1.0.0 [fabric,1.17+]	1.19.x 1.18.x 1.17.x	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.8.0 for 1.18.2	1.18.x	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.8.0 for 1.19.1 - 1.19.3	1.19.x	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.8.0 for 1.19	1.19	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.7.0 for 1.19.3	1.19.3	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.7.0 for 1.19	1.19	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.7.0 for 1.18.2	1.18.2	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.7.0 for 1.19.x	1.19.x	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.6.0 for 1.19.1	1.19.1	Fabric Quilt	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.4 for 1.19	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.4 for 1.18.2	1.18.2	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.3 for 1.19	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.3 for 1.18.2	1.18.2	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.2 for 1.19	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.2 for 1.18.2	1.18.2	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.1 for 1.18.2	1.18.2	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.1 for 1.19	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.5.0	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.4.1	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.4.0	1.19	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.3.5	1.18.x	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.3.4	22w07a 22w06a 22w05a +10	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix - v0.3.3	22w07a 22w06a 22w05a +10	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix v0.3.2	1.18.x	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix v0.3.1	1.18.x	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix v0.1.1	1.17.x	Fabric	21h ago	1	Download Open in new tab Copy link Report
R MemoryLeakFix v0.3.0	1.18.x	Fabric	21h ago	1	Download Open in new tab Copy link Report

[v1.1.5] MemoryLeakFix 1.1.5 [forge,1.17+] by FX on Oct 07, 2026

Download

Changes:**
Removed the custom payload memory leak fix

Update:**

Ive been really busy recently. So I don't have much time to maintain my mods, if you want this fix for versions below 1.20.2 I recommend using v1.1.2

All useable jars can be found here: https://modrinth.com/mod/memoryleakfix/versions

[v1.1.5] MemoryLeakFix 1.1.5 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

Changes:**
Removed the custom payload memory leak fix

Update:**

[v1.1.5] MemoryLeakFix 1.1.5 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

Changes:**
Removed the custom payload memory leak fix

Update:**

[v1.1.5] MemoryLeakFix 1.1.5 [fabric,1.17+] by FX on Oct 07, 2026

Download

Changes:**
Removed the custom payload memory leak fix

Update:**

[v1.1.4] MemoryLeakFix 1.1.4 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

Changes:**
Fixed networking issues in versions smaller than 1.20.1

[v1.1.4] MemoryLeakFix 1.1.4 [fabric,1.17+] by FX on Oct 07, 2026

Download

Changes:**
Fixed networking issues in versions smaller than 1.20.2

[v1.1.4] MemoryLeakFix 1.1.4 [forge,1.17+] by FX on Oct 07, 2026

Download

Changes:**
Fixed networking issues in versions smaller than 1.20.2

[v1.1.4] MemoryLeakFix 1.1.4 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

Changes:**
Fixed networking issues in versions smaller than 1.20.1

[v1.1.3] MemoryLeakFix 1.1.3 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

Changes:**
Add support for 1.20.x
Updated MixinExtras to v0.3.2
Multiple bug fixes

[v1.1.3] MemoryLeakFix 1.1.3 [forge,1.17+] by FX on Oct 07, 2026

Download

Changes:**
Add support for 1.20.x
Updated MixinExtras to v0.3.2
Multiple bug fixes

[v1.1.3] MemoryLeakFix 1.1.3 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

Changes:**
Add support for 1.20.x
Updated MixinExtras to v0.3.2
Multiple bug fixes

[v1.1.3] MemoryLeakFix 1.1.3 [fabric,1.17+] by FX on Oct 07, 2026

Download

Changes:**
Add support for 1.20.x
Updated MixinExtras to v0.3.2
Multiple bug fixes

[v1.1.2] MemoryLeakFix 1.1.2 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

Fix crash with latest MixinExtras version

[v1.1.2] MemoryLeakFix 1.1.2 [forge,1.17+] by FX on Oct 07, 2026

Download

Fix crash with latest MixinExtras version

[v1.1.2] MemoryLeakFix 1.1.2 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

Fix crash with latest MixinExtras version

[v1.1.2] MemoryLeakFix 1.1.2 [fabric,1.17+] by FX on Oct 07, 2026

Download

Fix crash with latest MixinExtras version

[v1.1.1] MemoryLeakFix 1.1.1 [fabric,1.17+] by FX on Oct 07, 2026

Download

Fixed a crash bug in v1.1.1 when used with Fabric

[v1.1.1] MemoryLeakFix 1.1.1 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

Fixed a crash bug in v1.1.1 when used with Fabric

[v1.1.1] MemoryLeakFix 1.1.1 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

Fixed a crash bug in v1.1.1 when used with Fabric

[v1.1.1] MemoryLeakFix 1.1.1 [forge,1.17+] by FX on Oct 07, 2026

Download

Fixed a crash bug in v1.1.1 when used with Fabric

[v1.1.0] MemoryLeakFix 1.1.0 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

Changes:

Fixed all issues related to force loading mixins
Updated MixinExtras to v0.2.0-beta.8 to fix issues

Pipeline Changes:

Killed CurseForge support

[v1.1.0] MemoryLeakFix 1.1.0 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

Changes:

Fixed all issues related to force loading mixins
Updated MixinExtras to v0.2.0-beta.8 to fix issues

Pipeline Changes:

Killed CurseForge support

[v1.1.0] MemoryLeakFix 1.1.0 [forge,1.17+] by FX on Oct 07, 2026

Download

Changes:

Fixed all issues related to force loading mixins
Updated MixinExtras to v0.2.0-beta.8 to fix issues

Pipeline Changes:

Killed CurseForge support

[v1.1.0] MemoryLeakFix 1.1.0 [fabric,1.17+] by FX on Oct 07, 2026

Download

Changes:

Fixed all issues related to force loading mixins
Updated MixinExtras to v0.2.0-beta.8 to fix issues

Pipeline Changes:

Killed CurseForge support

[v1.0.0] MemoryLeakFix 1.0.0 [forge,1.17+] by FX on Oct 07, 2026

Download

It's finally here**

The official Major release of MemoryLeakFix. With it comes multi-version and multi-platform support for both forge (1.15.2+) and fabric (1.14.4+)
Along with 2 new memory leak fixes. Enoy!

[v1.0.0] MemoryLeakFix 1.0.0 [fabric,1.14.4-1.16.5] by FX on Oct 07, 2026

Download

It's finally here**

The official Major release of MemoryLeakFix. With it comes multi-version and multi-platform support for both forge (1.15.2+) and fabric (1.14.4+)
Along with 2 new memory leak fixes. Enoy!

[v1.0.0] MemoryLeakFix 1.0.0 [forge,1.15.2-1.16.5] by FX on Oct 07, 2026

Download

It's finally here**

The official Major release of MemoryLeakFix. With it comes multi-version and multi-platform support for both forge (1.15.2+) and fabric (1.14.4+)
Along with 2 new memory leak fixes. Enoy!

[v1.0.0] MemoryLeakFix 1.0.0 [fabric,1.17+] by FX on Oct 07, 2026

Download

It's finally here**

The official Major release of MemoryLeakFix. With it comes multi-version and multi-platform support for both forge (1.15.2+) and fabric (1.14.4+)
Along with 2 new memory leak fixes. Enoy!

[v0.8.0-1.18.2] MemoryLeakFix - v0.8.0 for 1.18.2 by FX on Oct 07, 2026

Download

New Entity Memories Leak Fix**

Fixes [MC-260605](https://bugs.mojang.com/browse/MC-260605)
A memory leak where entity memories where not being cleared when they died/got removed.

Fixed:**

[#69](https://github.com/fxmorin/MemoryLeakFix/issues/69) - Issues with custom PacketByteBuf's

[v0.8.0-1.19.x] MemoryLeakFix - v0.8.0 for 1.19.1 - 1.19.3 by FX on Oct 07, 2026

Download

New Entity Memories Leak Fix**

Fixes [MC-260605](https://bugs.mojang.com/browse/MC-260605)
A memory leak where entity memories where not being cleared when they died/got removed.

Fixed:**

[#69](https://github.com/fxmorin/MemoryLeakFix/issues/69) - Issues with custom PacketByteBuf's

Memory Leak Fix

Memory Leak Fix

A mod that fixes multiple memory leaks in Minecraft. Both server-side & client-side

My other optimizations/fixes

Minecraft 1.20.5+

More Info

All Versions

No compatible versions found

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