
All-in-one mod that improves performance, reduces memory usage, and fixes many bugs. Compatible with all your favorite performance mods!
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ModernFix is an all-in-one mod that improves performance, reduces memory usage, and fixes many bugs in modern Minecraft versions (most versions including and above 1.16 are supported) without majorly compromising the game experience. Most Forge 1.16-1.19.2 modpacks will launch roughly twice as fast with ModernFix installed. If some non-default options are enabled, it can even allow large modpacks like All The Mods 8 to run with 3GB or less of allocated memory.
ModernFix is free, open-source software. All of the code is available on the GitHub repository.
What exactly does ModernFix do for your game? There are a lot of tweaks being made - too many to summarize here. However, here is a brief summary of the general types of improvements being made:
If you are technically savvy and looking for more details on each patch, I recommend reading the Summary of Patches wiki page.
Please either report an issue on GitHub, or join the Discord and ask in the #modernfix-discussion channel.
Be sure to mention the Minecraft version, modloader, and ModernFix version you are using, as well as what other mods you have installed.
There are two main ways you can help support the development of ModernFix:
There are many performance mods available for Minecraft and I can't list them all here, but here are some essential mods, in my opinion:
On a related note: I do not recommend use of OptiFine in any modded scenario. It is closed-source, patches the game in a way that easily breaks Forge and other mods, and significantly slows down game launching, often on the order of minutes. Please try Sodium (on Fabric) or Embeddium (on Forge) instead! Using OptiFine with ModernFix is not officially supported, and may cause issues.

Último archivo publicado para cada versión de Minecraft y cargador, con su hash oficial para que compruebes la integridad.
| Minecraft | Cargadores | Archivo | Tamaño | SHA-1 | Publicado | Obtener |
|---|---|---|---|---|---|---|
| 1.20.1 Estable | Forge | modernfix-forge-5.27.89+mc1.20.1.jar 5.27.89+mc1.20.1 | 987 KB | df959e26d3ba4eba37de87155a67ac705dcfdae4Sin escanear: archivo externo | 19 oct 2026 | Obtener |
| 26.1.2 Estable | NeoForge | modernfix-neoforge-5.27.24+mc26.1.2.jar 5.27.24+mc26.1.2 | 500 KB | 693d8b42a2dc717e7cfc26a8afa50db928cfe36aSin escanear: archivo externo | 8 oct 2026 | Obtener |
| 1.21.1 Estable | NeoForge | modernfix-neoforge-5.27.26+mc1.21.1.jar 5.27.26+mc1.21.1 | 597 KB | 69d468b70e53f6a014c778a81116a41a38fbab33Sin escanear: archivo externo | 8 oct 2026 | Obtener |
| 1.20.1 Estable | Fabric | modernfix-fabric-5.25.2+mc1.20.1.jar 5.25.2+mc1.20.1 | 532 KB | be03b9eb570c1e9df7593e68623f0fecbd039460Sin escanear: archivo externo | 8 dic 2025 | Obtener |
| 1.21.1 Estable | Fabric | modernfix-fabric-5.25.1+mc1.21.1.jar 5.25.1+mc1.21.1 | 460 KB | 4ab39e9c736e7204146792c545ec5b29fc0a3872Sin escanear: archivo externo | 8 nov 2025 | Obtener |
| 1.19.2 Estable | Forge | modernfix-forge-5.18.1+mc1.19.2.jar 5.18.1+mc1.19.2 | 759 KB | 532d4dcc05095d7aa2289e4758e5c8265c759c9bSin escanear: archivo externo | 11 oct 2024 | Obtener |
| 1.19.2 Estable | Fabric | modernfix-fabric-5.18.1+mc1.19.2.jar 5.18.1+mc1.19.2 | 634 KB | 6ea21371a8a7fc23383f5b9041fc5b61cd1af5adSin escanear: archivo externo | 11 oct 2024 | Obtener |
| 1.20.1 Estable | ForgeNeoForge | modernfix-forge-5.18.6+mc1.20.1.jar 5.18.6+mc1.20.1 | 757 KB | ace6243d0985d1cb56a6156e0f1903dd72542586Sin escanear: archivo externo | 8 jul 2024 | Obtener |
| 1.18.2 Estable | Forge | modernfix-forge-5.18.0+mc1.18.2.jar 5.18.0+mc1.18.2 | 740 KB | 56a7629faca859ae5774d29ced0bd26e6d091fc9Sin escanear: archivo externo | 5 jun 2024 | Obtener |
| 1.18.2 Estable | Fabric | modernfix-fabric-5.18.0+mc1.18.2.jar 5.18.0+mc1.18.2 | 682 KB | 3a97f3dc533c93158dff93694be069977829f934Sin escanear: archivo externo | 5 jun 2024 | Obtener |
| 1.16.4, 1.16.5 Estable | Forge | modernfix-forge-5.18.0+mc1.16.5.jar 5.18.0+mc1.16.5 | 847 KB | bd020d379e36ed8a2568fa76d998aff265cb57bbSin escanear: archivo externo | 5 jun 2024 | Obtener |
| 1.16.4, 1.16.5 Estable | Fabric | modernfix-fabric-5.18.0+mc1.16.5.jar 5.18.0+mc1.16.5 | 600 KB | a9971e7a3c7652409747a2daf23245a90703cf4dSin escanear: archivo externo | 5 jun 2024 | Obtener |
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