Ready for your server: ImmediatelyFast has versions for Fabric, NeoForge and Forge. Create your world with one of those loaders and a version from the table below. The newest option is Fabric on Minecraft 1.21.1.
What ImmediatelyFast does
Speed up immediate mode rendering in Minecraft
ImmediatelyFast is an open source Minecraft mod which improves the immediate mode rendering performance of the client.
- Author
- RaphiMC
- Categories
- optimization
- Loaders
- Fabric, Forge and NeoForge
- Minecraft versions
- 26.3, 26.2, 26.1.2 and 27 more (oldest: 1.18.2)
- Latest version
- 1.6.15+1.21.1-fabric (Fabric, October 13, 2026)
- Downloads
- 135,315,225
- License
- LGPL 3.0 or later
Which Minecraft version and loader it works with
Every world has its own Minecraft version and loader (vanilla, Fabric, Forge or NeoForge).
To play with ImmediatelyFast, create your world with any of these combos:
| Loader | Newest | Minecraft versions |
|---|---|---|
| Fabric | 26.3 | 26.3, 26.2, 26.1.2 and 27 more (oldest: 1.18.2) |
| NeoForge | 26.3 | 26.3, 26.2, 26.1.2 and 19 more (oldest: 1.20.2) |
| Forge | 1.21.4 | 1.21.4, 1.21.3, 1.21.2 and 13 more (oldest: 1.19) |
Does it go on the server or on players' games?
ImmediatelyFast is a client-only mod: it doesn't run on the server. Each player installs it in their own Minecraft if they want it. Add it in the panel as "Players only" and it ships inside everyone's modpack.
| Where | Per Modrinth |
|---|---|
| Server | not supported |
| Players | required |
| What the panel suggests | Players only |
What other mods it needs
None: its latest version doesn't require any other mods on Modrinth.
How to add ImmediatelyFast to your server
- Open the panel and create a world with a compatible loader and Minecraft version (Fabric, NeoForge and Forge, per the table above), or open one you already have.
- In the world's "Mods" section, search for ImmediatelyFast in the Modrinth catalog. You'll only see what works with your world.
- Add it with the "Players only" option, the one the panel suggests for this mod.
- Start or restart the server so it installs.
- Ask your friends to download the .mrpack modpack from the panel again.
Not sure about client vs. server mods? Read the modded server guide. What each size costs is on the pricing page. Prices in Mexican pesos (MXN).
Frequently asked questions
Which loader and Minecraft version does ImmediatelyFast work with?
ImmediatelyFast has versions for Fabric: 1.18.2 to 26.3 (30 versions); NeoForge: 1.20.2 to 26.3 (22 versions); Forge: 1.19 to 1.21.4 (16 versions). You pick the loader and version when you create your world; the newest option is Fabric on Minecraft 1.21.1. The panel's catalog only shows ImmediatelyFast if it has a version for your world.
Do players have to install ImmediatelyFast?
ImmediatelyFast is a client-only mod: it doesn't run on the server. Each player installs it in their own Minecraft if they want it. Add it in the panel as "Players only" and it ships inside everyone's modpack.
What other mods does ImmediatelyFast need?
Its latest version (Fabric) doesn't require any other mods on Modrinth: just add ImmediatelyFast and you're set.
Is it worth adding ImmediatelyFast to the server if it's client-only?
Yes, as a convenience. It does nothing on the server, but if you add it as "Players only", it ships inside the .mrpack modpack and everyone gets it without searching. It uses no server resources.
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Build your server with ImmediatelyFast
Create your Minecraft server, add any mods you like and pay only for the hours you play.
Modrinth data updated October 19, 2026.