Home › Guides › How to Host a Fabric Server (Setup, RAM & Mods) — 2026 Guide
How to Host a Fabric Server (Setup, RAM & Mods) — 2026 Guide
Fabric is the lightweight, fast-moving mod loader that powers most modern performance and quality-of-life packs. It boots quickly, updates to new Minecraft versions early, and runs happily on modest RAM — which makes it the easiest loader to host well. Here's how to set one up properly.
How much RAM does a Fabric server need?
Fabric itself is thin. A vanilla-plus Fabric server with performance mods (Lithium, FerriteCore, Krypton) runs beautifully on less RAM than any Forge equivalent. What you actually size for is the mod list — a handful of optimisation mods is nothing; a 150-mod Fabric kitchen-sink pack is another story.
| Players | Recommended server RAM | Notes |
|---|---|---|
| 1–4 | 3–4 GB | Vanilla-plus with performance mods; very light. |
| 5–10 | 5–6 GB | Comfortable for QoL + optimisation mod lists. |
| 10–20 | 6–8 GB | Larger Fabric packs or bigger communities. |
| 20+ | 8–10 GB | Heavy mod lists; performance is the ceiling, not slots. |
Setup steps
- Pick a plan with 4–6 GB RAM for a typical friend group.
- Choose 'Fabric' from the loader/modpack installer, or paste the Modrinth/CurseForge Fabric pack — MineXEngine downloads it for you.
- Let the server detect the version. Fabric tracks new Minecraft releases closely; the engine matches the Fabric Loader build and the correct Java (17 for 1.18–1.20.4, 21 for 1.20.5+) automatically.
- Add server-side mods to the mods folder (see the next section), then set difficulty, view-distance and your whitelist.
- Start the server, let world-gen settle, and hand out the IP.
Adding Fabric mods safely
The #1 Fabric mistake is dropping a client-only mod (a shader loader, a minimap, a mod menu) into the server and watching it crash on boot. Server mods and client mods are not interchangeable.
- Every server needs the Fabric API mod — most Fabric mods depend on it.
- Only install mods marked as server-side or 'both'. Client-only mods (Sodium, Iris, minimaps, Mod Menu) belong on players' clients, not the server.
- Match every mod to the server's exact Minecraft version — a 1.20.1 mod will hard-crash a 1.21 server.
- Add mods a few at a time and restart between batches, so a bad mod is easy to spot in the log rather than hidden in a pile of 30.
Fabric vs Forge — which should you host?
Choose the loader your pack targets — you can't mix them. Fabric is lighter, boots faster and reaches new Minecraft versions first, so it dominates performance and QoL packs. Forge (and its successor NeoForge) hosts the big tech/magic kitchen-sink packs. If you're building your own server from scratch and want it light and fast, Fabric is the easy pick.
MineXHost runs Fabric servers on MineXEngine — our launcher auto-detects the modpack, picks the right Minecraft loader and Java version, tunes the JVM for your RAM, and auto-recovers from the crashes that normally end a modded server's evening. Pick your RAM, paste the pack, and play.
See hosting plansFrequently asked questions
How much RAM does a Fabric server need?
A vanilla-plus Fabric server with performance mods runs great on 3–4 GB for a small group; 5–6 GB covers most quality-of-life mod lists and 10-plus players. Fabric is the lightest loader to host — you rarely need the 10–16 GB a heavy Forge pack demands.
Can I put any Fabric mod on my server?
No — only server-side or 'both' mods go on the server. Client-only mods like Sodium, Iris and minimaps belong on players' game clients and will crash a server if installed there. Almost every Fabric server also needs the Fabric API mod.
What Java version does Fabric need?
It depends on the Minecraft version: Java 17 for 1.18–1.20.4 and Java 21 for 1.20.5 and newer. On MineXHost the MineXEngine launcher picks the right Java automatically so you never mismatch it.
Is Fabric or Forge better for a server?
Neither is 'better' — you run whichever your pack targets, since they're incompatible. Fabric is lighter and faster and leads new Minecraft versions; Forge/NeoForge hosts the big tech-and-magic kitchen-sink packs.