
modpack
FlawlesslyOptimizedMinecraft modpack for 1.21.1
[1.21.1 | 1.20.1] [NeoForge🦊 | Forge⚒️] An open-source modpack that improves the overall UX and the game's performance and visuals, while focusing on complete OptiFine-parity.
- Latest version
- 1.1.0+neo.1.21.1
- Minecraft
- 1.20.1 to 1.21.1
- Java
- Java 21+
- Loaders
- NeoForge, Fabric, Forge
- Licence
- Apache-2.0
- Downloads
- 3.3k
- Updated
- 20 mo ago
- Available on
- Modrinth
Host FlawlesslyOptimized servers
One click and FlawlesslyOptimized is installed with the right loader, on hardware built for it.
- 1.21.1
- NeoForge
- Fabric
- Forge
- One click modpack install
- Dependencies handled
- Tuned startup flags
- NVMe SSD
Screenshots
Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.
Minecraft versions
Every version FlawlesslyOptimized declares support for, newest first, with the Java runtime that version needs.
Download
From FlawlesslyOptimized’s own host. Nothing is re-hosted here.
FlawlesslyOptimized 1.1.0+neo.1.21.1.mrpack · 0.0 MB · for 1.21.1
be4ad0d5bf01…Older versions13Hide older versions
- 1.1.0+forge.1.20.124 Nov 20241.20.10.2 MB442 downloads
651eb274667a…Get - 1.0.4+fabric.1.2125 Jul 20241.210.0 MB304 downloads
9944f78ea7d9…Get - 1.0.4+neo.1.20.125 Jul 20241.20.116.5 MB254 downloads
627bb11a94c0…Get - 1.0.4+forge.1.20.125 Jul 20241.20.116.5 MB247 downloads
1e9cb05cd693…Get - 1.0.3+fabric.1.2110 Jul 20241.210.0 MB175 downloads
8c945d613f58…Get - 1.0.3+neo.1.20.110 Jul 20241.20.116.5 MB130 downloads
29aec4ed3b24…Get - 1.0.3+forge.1.20.110 Jul 20241.20.116.5 MB142 downloads
0b54bea6c48f…Get - 1.0.2+fabric.1.219 Jul 20241.210.0 MB116 downloads
837022512ac0…Get - 1.0.2+neo.1.20.19 Jul 20241.20.116.5 MB130 downloads
e66e397c3ee9…Get - 1.0.2+forge.1.20.19 Jul 20241.20.116.5 MB116 downloads
a6768f638e2b…Get - 1.0.1+fabric.1.217 Jul 20241.210.0 MB128 downloads
a0f1d1adf206…Get - 1.0.0+fabric.1.2126 Jun 20241.210.0 MB145 downloads
07edea2003d8…Get - 1.0.0+fabric.1.20.126 Jun 20241.20.10.0 MB154 downloads
f35d230e926e…Get
Frequently asked
Does FlawlesslyOptimized work on Minecraft 1.21.1?
Yes. 1.21.1 is the newest Minecraft version FlawlesslyOptimized declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.
Which Minecraft versions does FlawlesslyOptimized support?
Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.
Do I need to install FlawlesslyOptimized on the client or the server?
The client only. There is nothing to install on the server, so it works on any server you can already join.
Which loader does FlawlesslyOptimized need?
NeoForge, Fabric, Forge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for FlawlesslyOptimized?
Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the modpack itself.
What licence is FlawlesslyOptimized 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 FlawlesslyOptimized?
Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the modpack and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.
Where do I download FlawlesslyOptimized safely?
From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.
Works on the same versions
Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.
Is this information wrong or missing something? .

