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modpack

I can't believe it's not Optifine!Minecraft modpack

Modpack designed to be very close to the Optifine experience.

Latest version
1.21.8.0
Minecraft
no version declared
Java
follows the game
Loaders
none declared
Licence
Apache-2.0
Downloads
1.1k
Updated
11 mo ago
Available on
Modrinth
Space NodeOur hosting

Host I can't believe it's not Optifine! servers

One click and I can't believe it's not Optifine! is installed with the right loader, on hardware built for it.

  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Download

From I can't believe it's not Optifine!’s own host. Nothing is re-hosted here.

Most recently published release

1.21.8.0release25 Nov 2025

I can't believe it's not Optifine! 1.21.8.0.mrpack · 6 KB · for 1.21.8 · Fabric

Download this release
86f9e8a39f50…
Older versions9
  • 1.21.7.03 Jul 20251.21.740 KB79 downloads364e9f4a00e4…Get
  • 1.21.4.127 May 20251.21.440 KB86 downloadsa0d6a8d80d8f…Get
  • 1.21.5.124 May 20251.21.540 KB95 downloads08da53620ec9…Get
  • 1.21.4.020 May 20251.21.440 KB56 downloadsff40baf9d85c…Get
  • 1.21.5.017 May 20251.21.540 KB65 downloadsc54bd4c0b351…Get
  • 1.21.3.020 Dec 20241.21.36 KB129 downloads20f8dd330d91…Get
  • 1.21.1.025 Aug 20241.21.140 KB222 downloads0f0e08b163d9…Get
  • 1.21.0.123 Jul 20241.2140 KB176 downloads36b157b46ee6…Get
  • 1.21.0.023 Jul 20241.2156 KB119 downloadsae49f1e4780b…Get

Frequently asked

What licence is I can't believe it's not Optifine! under?

Apache-2.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install I can't believe it's not Optifine!?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download I can't believe it's not Optifine! safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Which Minecraft versions does I can't believe it's not Optifine! work on?

The author has not declared a supported version in the metadata we sync, so there is nothing here we can state as fact. Check the project's own page before installing it, and treat an old modpack with no declared version as untested on modern Minecraft.

Details from Modrinth, where the author last updated it on 25 Nov 2025. We do not host files or republish descriptions. Available download links point to the author’s own release.

Not indexed yet. Score 54 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .