Mods Optimizer
by Kaworru
Mods Optimizer is a Forge and NeoForge mod that sorts a mods folder at startup, disabling files meant only for the client on servers and removing duplicate or outdated mod versions.
What it does
On startup, the mod scans the mods folder, classifies each file by side and disables those that the server does not need. Server owners therefore no longer need separate client and server modpacks built by hand. It also detects duplicate mod versions and keeps only the latest one, which keeps the folder tidy and avoids version conflicts. Because it renames or moves files inside the mods folder, the author advises keeping regular backups of modpack and server files, since the safety checks cannot cover every edge case.
The environment is client and server, so the mod is meant to be installed on both sides with the same modpack, and the author recommends using it on both. Files exist for Forge and NeoForge across 23 release versions, 1.18.2 – 1.21.11, and the code is open source under the MIT License. Fabric is not supported, since the loader's startup order blocks the mod from working correctly.
Key features
Startup mod sorting
Each mod file is checked at startup and files that do not belong on the server are disabled.
Duplicate version removal
When several versions of the same mod are present, the mod keeps the latest and removes the older copies during startup.
Single shared modpack
One modpack can be used for both the client and the server, without maintaining two separate lists of mods.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
1.20.x6 of 6 versions with builds
1.19.x5 of 5 versions with builds
1.18.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
FTB Quests Optimizer is a Fabric, Forge and NeoForge mod released under the MIT License for 1.16.5 – 1.21.1, and it is server required with client optional. Easy Server Optimizer(ESO) is a Forge and NeoForge server-side only mod for 1.18.2 – 1.21.8 under All rights reserved, and it is not open source. HCsCR is a client-side only mod for Fabric, Forge, NeoForge and Quilt under the Apache License 2.0, so it targets players rather than servers.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Mods Optimizer | Forge and NeoForge | 1.18.2 – 1.21.11 | Client and server | 2026-06-07 |
| FTB Quests Optimizer | Fabric, Forge and NeoForge | 1.16.5 – 1.21.1 | Server required, client optional | 2026-04-14 |
| Easy Server Optimizer(ESO) | Forge and NeoForge | 1.18.2 – 1.21.8 | Server-side only | 2026-08-23 |
| HCsCR | Fabric, Forge, NeoForge and Quilt | 1.16.5 – 26.3 | Client-side only | 2026-10-15 |
Questions
Does Mods Optimizer work with Fabric?
Does Mods Optimizer have to be installed on both sides?
Can Mods Optimizer delete files from the mods folder?
In the catalog
Mods Optimizer is one of 3,545 Optimization mods on ModsFinder, and one of 1,441 Optimization mods for Forge. 19,862 mods support Minecraft 1.21.11.
More from Kaworru
Similar mods
What the author says
Mods Optimizer will rename or move files inside your mods folder. ➡️ Make sure to keep regular backups of your modpack and server files. While the mod includes safety checks, it cannot cover every possible edge case. Mods Optimizer automatically disables mods that are client-only or incompatible with servers. You no…
Official listing
- Modrinth page
- modrinth.com/mod/mods-optimizer
- Owner
- Kaworru
- Published
- 2023-12-09
- Updated on Modrinth
- 2026-06-07
- Facts verified
- 2026-10-15