Mods & Modpacks
30 guidesForge, Fabric, NeoForge and Quilt, installing modpacks, the hybrid server software, and why modded servers behave differently.
The loader decides everything else, so settle that first. This guide explains Forge, Fabric, NeoForge and the hybrids and which one a given pack needs. Modpacks install from the panel, and anything not in the list can be installed manually.
One expectation worth setting: modded servers are limited by single-thread CPU speed far more than by core count, so a heavy pack behaves differently from a vanilla server of the same size. Sizing a modded server covers the numbers, and whether your players need the mods too is the question that catches most people out.
- "Request failed with status code 500" / 403 when installing a mod — how do I fix it?
- Are mods client-side or server-side — do players need them too?
- Can I add mods after the server has started, or will it crash?
- Can I add mods to a Bedrock server?
- Can I run mods and plugins on the same server, and how?
- Can crossplay work with mods and plugins together?
- Can you install the modpack for me?
- Do you support Quilt / how do I install it?
- Does modpack install work the same for Fabric packs?
- How do I install a mod manually or from CurseForge when it's not in the list?
- How do I install a modpack that's not in the list, or a custom/self-made pack?
- How do I install a modpack?
- How do I install mods?
- How do I manually install Forge or Fabric (installer, server.jar naming)?
- How do I move files, mods, and world between two of my servers?
- How do I run a custom or unlisted JAR (Waterfall, Velocity, Magma, a specific fork)?
- How do I safely edit server.properties (e.g. a missing online-mode line)?
- How do I set someone's gamemode or give creative?
- How many mods or plugins can N GB of RAM handle?
- Mods need Forge/Fabric — how do I set that up first?
- My mod count is high (200/300/600 mods) — is that too many?
- My server won't start or crashes with a specific modpack — help?
- On a hybrid, do plugins go in the plugins folder or the mods folder?
- The online-mode line is missing, or the server stops when I set it false — how do I fix it?
- What are Forge, Fabric, Spigot, Purpur, Mohist, Magma, Arclight — and which do I use?
- What does a mod's dependencies question mean — what does mod X need?
- Which CurseForge version do I join on for my modpack (e.g. ATM8)?
- Which hybrid (Mohist / Magma / Arclight) is best?
- Which loader/Forge version does modpack X need?
- Which plan for a specific big modpack (ATM9, DawnCraft, SkyFactory, etc.)?
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