All optimization packs in one. The goal of Harmony is to include as many mods as possible from the most popular optipacks (optimization modpacks), to create the best possible level of optimization.
The full list of mods is available here.
Version Format
harmony-mc1.21.8-v1
- harmony: the name of the pack
- mc: the version of minecraft that version works on
- v: the version of the mod
Derivatives
The mods in this pack can be used according to their licenses (found in the Mod List above). Any code you use found only in this modpack (none of the mods inside of the pack) can be used according to the project's license.
Notes
- Harmony doesn't support 1.21.6 due to graphical issues with that version.
- 1.21.7 versions aren't recommended due to graphical issues with that version.
- FPS Test done using default options.txt (without v-sync and unlimited fps) using harmony-mc1.21.8-v1.0.
Test PC Specs
HP OMEN 25L Desktop GT12-0xxx
Windows 11 Home (Build 22631)
Intel Core i5-10400 CPU
HP 8704 MOTHERBOARD
16 GB RAM
NVIDIA GeForce RTX 2060 (6 GB) GPU
made by splewsh
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.8
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Downloads as Harmony 1.21.8 harmony-mc1.21.8-v1.mrpack
- Download size: 42 KB
- Download link checked 6 Sept 2026 — working
These come from our own check of the pack file, not from the source page.