CurseForge · Minecraft modpack
Flawlessly Optimized
[1.21.1 Release] Boost your Minecraft performance with smooth gameplay and essential OptiFine features, all while keeping the game’s original feel.
Quick answer
Which Flawlessly Optimized release matches 1.21.4?
1.6.3 for 1.21.4 is a complete pack release for 1.21.4 with Fabric 0.16.10. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 43 mods in this pack file.
Pack setup
How should I set up Flawlessly Optimized for players and a server?
Use 1.6.3 for 1.21.4 as the pack version. Install the pack as its own launcher instance. The creator’s listing does not name a separate server file, so check the release notes before setting up a dedicated server. Do not upload the ordinary client folder blindly.
A pack is a matched client and server setup, not one mod with an install-side label. Keep its release, loader, manifest and overrides together.
These numbers come from the pack file you chose. “Not labelled” means we don’t know which side it belongs on—not that it is safe everywhere. The file count is not a RAM estimate.
What are the server requirements for Flawlessly Optimized?
1.6.3 for 1.21.4 on 1.21.4. The pack contents and setup notes below stay tied to that release.
The selected pack release is 1.6.3 for 1.21.4. That file is for Minecraft 1.21.4 with Fabric 0.16.10. It contains 43 mod projects. The creator’s listing does not name a separate server file. Check their notes before using one, and do not upload an ordinary client folder or rebuild the pack mod by mod. A file count cannot tell us the right RAM, CPU or storage; size the server for the players and world you actually run.
About this project
What kind of pack is Flawlessly Optimized?

Flawlessly Optimized
🎮Experience Unmatched Performance
Flawlessly Optimized brings you a top-tier Minecraft experience with modern performance mods like Sodium, FerriteCore, and ImmediatelyFast. Enjoy lightning-fast gameplay and smooth visuals, even on low-end hardware.
💎OptiFine Features Included
Our modpack supports essential OptiFine features such as shaders, connected textures, and zoom. If your favorite resource pack requires OptiFine, it will work seamlessly with Flawlessly Optimized. Embrace the power of OptiFine without the need for a separate mod!
🌼Stay True to Vanilla
Flawlessly Optimized ensures you can enjoy Minecraft just as you remember it. Our modpack maintains the core gameplay experience of Vanilla Minecraft, while delivering substantial performance improvements.
📜Built on Fabric
Leveraging the lightweight and fast Fabric mod loader, Flawlessly Optimized is designed to be quick and efficient. We provide support for the latest Minecraft versions, ensuring that you always have access to the newest features and improvements.
🧑💻Open Development
Flawlessly Optimized is open-source and hosted on GitHub. This transparency allows you to view the code, contribute to the project, and help us make the modpack even better. We value community input and collaboration in our development process.
🔄️Rapid Updates
We prioritize keeping up with Minecraft’s latest updates. Flawlessly Optimized receives frequent updates to ensure compatibility with the newest game versions and features, allowing you to enjoy the latest content and improvements.
⚙️Customize Your Experience
While Flawlessly Optimized delivers exceptional performance out of the box, it also offers freedom for you to add your favorite mods. Build your own custom modpack based on our foundation to tailor your Minecraft experience to your liking.
👐Join Us Today!
Be part of our vibrant community of Minecraft enthusiasts. Share your feedback, contribute to development, and make the most of your Minecraft adventures with Flawlessly Optimized.
🆙Versioning
The versioning format is x.y.z-<pre-release>-<MC version>, where
x:MAJOR version (1.21 was 1.y.z, 1.22 was 2.y.z)y:MINOR version (Big updates - Mod addition/removal)z:PATCH version (Small changes - Micro Config Update,Mod Updates)pre-release:For untested,breaking changes,not ready for use versions (Values: alpha,beta)- the MC version taken is the minor release the version of Flawlessly Optimized is for.
x.y.z is reset to x.0.0 for every new MC release as different MC versions are very likely to have different mod sets available for them.
This is a continuation of the modpack. If you need old versions of the game, go here
Project description from CurseForge.
Mods in 1.6.3 for 1.21.4
Open any mod on Modpacks.ch to check its files and dependencies.
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Flawlessly Optimized by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.3
1 loader build1.21.1
1 loader buildMade local changes? Try them in a copied instance before touching a world you care about.
Recent files
Flawlessly Optimized versions and loaders
Looking for an older file? The official CurseForge project page is in Resources.