NLauncher Server Sync
by Nyfaria
NLauncher Server Sync lets a server owner publish its mod set so that NLauncher players receive matching mods and configs on launch.
What it does
The mod is installed only on the server. A server owner adds it to a Fabric, Forge, NeoForge or Quilt server, and the mod exposes a built-in sync API. When a player adds the server address in NLauncher, the launcher reads the server information and creates a matching instance. Each time the player starts the game, NLauncher checks for updates and syncs mods and configs automatically, so players do not install anything by hand.
Server owners control what is synced. Config file patterns select exactly which configuration files are pushed, and globs are supported. Mods marked as excluded are skipped, which keeps server-only mods out of the player's instance. The mod serves files directly from the server, so no external hosting or CDN is needed. It can sync a modpack placed on external hosting too, for those who prefer manual transfers. The sync port defaults to 25580, and the server display name is shown to players in the launcher.
The mod pairs with the NLauncher Minecraft launcher and works on the 1.18.2 – 1.21.11 range. Files are published for 1.18.2, 1.19.2, 1.20.1, 1.21.1 and 1.21.11, with 1.1.0 for 1.21.11 as the latest build on each loader. It is released under All rights reserved and is not open source.
Key features
Automatic instance creation
NLauncher reads the server's sync information and builds a matching instance when the player adds the server address.
Sync on every launch
Each launch checks for changed mods and configs and applies them before the game starts.
Config file patterns
Server owners list the exact configuration files to push, using glob patterns.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Static Options is a client-side only mod, open source under the MIT License, for 1.13 – 1.21.8. FleiSync is server-side only, under the MIT License and not open source, for 1.16.1 – 26.3. MPDS is also server-side only and is not open source, for Fabric on 1.18 – 1.21.11, released under All rights reserved. NLauncher Server Sync covers 1.18.2 – 1.21.11 on four loaders, and only the server needs it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| NLauncher Server Sync | Fabric, Forge, NeoForge and Quilt | 1.18.2 – 1.21.11 | Server-side only | 2026-03-16 |
| Static Options | Fabric, Forge, NeoForge and Quilt | 1.13 – 1.21.8 | Client-side only | 2025-09-05 |
| FleiSync | Fabric, Forge, NeoForge and Quilt | 1.16.1 – 26.3 | Server-side only | 2026-10-10 |
| MPDS | Fabric | 1.18 – 1.21.11 | Server-side only | 2026-08-28 |
Questions
Does NLauncher Server Sync need to be installed on the client?
Which loaders can run the server mod?
Can the server send files without an external host?
In the catalog
NLauncher Server Sync is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Nyfaria
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What the author says
Automatically sync your modpack to every player — no external hosting, no manual downloads. NLauncher Server Sync is a server-side only mod that pairs with the NLauncher Minecraft launcher. Install it on your server and your players will automatically receive every mod and config update the moment they launch the game.
Official listing
- Modrinth page
- modrinth.com/mod/nlauncher-server-sync
- Owner
- Nyfaria
- Published
- 2026-03-15
- Updated on Modrinth
- 2026-03-16
- Facts verified
- 2026-10-15