What AllTheLeaks works with.
| Platform | Java Edition |
|---|---|
| Loaders | Forge, NeoForge |
| Minecraft versions | 1.20.1, 1.21.1 |
| Environment | Client, Server |
AllTheLeaks patches memory leaks that build up in vanilla Minecraft, in Forge or NeoForge itself, and in other mods that have not shipped their own fix yet. It runs automatically the moment it is in the mods folder, on both the client and the server, and it is the mod most modpack players reach for when a heavy session that ran fine for an hour starts crawling or crashing after a few more.
What it fixes, and why it exists
Creator Uncandango built AllTheLeaks to fill the gap between how fast modpacks update and how slowly some mod authors patch their own leaks, especially on older Minecraft versions that stopped getting attention. When the original mod ships a real fix for a given leak, AllTheLeaks turns its own patch for that leak off. It is a stability tool rather than a performance one: on a machine with plenty of RAM it will not raise FPS, but on a long session with mid to low memory it keeps things running as smoothly as the moment you logged in.
Not the same mod as the old Memory Leak Fix
AllTheLeaks gets confused with an older Modrinth project called Memory Leak Fix, made by a different author, fxmorin, which stopped receiving updates in January 2024. AllTheLeaks is a separate codebase, created a few months later by Uncandango, built to solve the same category of problem and still receiving regular updates. If a modpack lists a memory-leak mod as a dependency, check which project it actually points to rather than assuming the two are interchangeable.
Loader and version support
- NeoForge: current through 1.21.1 (build 1.1.12, uploaded August 14, 2026).
- Forge: current through 1.20.1 (build 1.1.3, uploaded August 31, 2026); AllTheLeaks has never shipped a Forge build past 1.20.1.
- No Fabric or Quilt build exists.
The periodic log message, explained
Every ten minutes, AllTheLeaks writes a short status check to the log and to the F3 debug screen: lines like Listing events..., Listing memory leaks so far..., Waiting to stabilize [0/10], and finally No memory leak detected! when nothing is wrong. Players running modpacks such as All the Mods 10 have asked what these lines mean after seeing them on their screen or in a server log while idle. They are the mod doing its scheduled job, not an error, and it stays quiet the rest of the time unless it actually finds a leak to patch.
Installation
- Drop the jar into the mods folder for Forge or NeoForge, matching the Minecraft version the modpack runs.
- Install it on both client and server; some of its fixes are shared between the two sides, so a mismatched install can behave inconsistently.
- No config file to edit. It starts applying its fixes as soon as the game loads.
Questions about AllTheLeaks.
5 questions
What does the AllTheLeaks log message mean?
Every ten minutes AllTheLeaks writes a routine status check to the log and the F3 screen, ending in lines like Waiting to stabilize [0/10] and No memory leak detected! That is the mod confirming it just ran its scheduled leak check and found nothing wrong. It is not an error and needs no action; it only gets louder when it actually finds and patches a leak.
Is AllTheLeaks the same as the old Memory Leak Fix mod?
No. Memory Leak Fix on Modrinth, by fxmorin, stopped updating in January 2024. AllTheLeaks is a separate project by a different author, Uncandango, created a few months later to solve the same kind of problem and still receives regular updates. They are not interchangeable even though they share a category and a similar name.
Does AllTheLeaks work on Minecraft servers?
Yes. Some of its memory-leak patches are shared between client and server, so it should be installed on both sides of a modded server rather than only the client, to avoid mismatched behavior.
Will AllTheLeaks increase my FPS?
Usually not, if the machine already has plenty of RAM. Its job is stability rather than raw frame rate: on a system with mid to low memory it keeps a long session running as smoothly as the moment it started, instead of degrading the longer it stays open.
Does AllTheLeaks support Fabric or Quilt?
No. Every published build is for Forge or NeoForge only; there is no Fabric or Quilt port. A modpack on either of those loaders needs a different memory-leak mod instead.
