Fabric's OptiFine

Fabric's OptiFine

OptiFine replicated as close as possible on the newest versions of Minecraft on the fabric mod loader.

by DXROKK
902 Downloads
0 Followers
fabricMC 1.21.10lightweightoptimization

Screenshots

FPS Boost

About this Modpack

A very lightweight modpack replicating the OptiFine mod as close as possible to the original.
In game screenshot showing the frames per second

Performance Boost

This modpack uses many modern performance mods made for the fabric mod loader aiming to provide the best performance boost you can get, the same as the OptiFine mod does.

Features from OptiFine

Fabric's OptiFine has almost all original OptiFine features such as, Shaders, Zoom (By holding C on your keyboard), Connected Textures, OptiFine required Resource packs, 3D Animations for custom mob or player textures, contains no content mods so it can be used on any server.
And Many other Smaller OptiFine features.

Can be used as a base modpack

As this modpack contains no content mods feel free to use this as a base for your own modpacks.

Updates

Fabric's OptiFine is made by 1 person only (Me, DXROK) so updates can take time also as new versions of Minecraft usually dont support mods that havent been updated yet that will also delay updates and also mean some versions of this modpack will have better or more features than others.
I will do my best to make all updates as similar as possible.

Additional Info

Fabric's OptiFine comes with no pre-installed shaders or resource pack so you will need to add your own.

Settings and Configs are adjusted to give you the best performance while keeping the game smooth and good looking but feel free to change anything to your liking.

Any issues can be reported on my Discord server which can be joined here. > Discord

Available Versions

Fabric's OptiFine 1.3release
MC 1.21.8fabric264 downloads
November 12, 2025

How to Set Up a Fabric's OptiFine Server

1

Order Server

Choose at least 4 GB RAM (6 GB recommended for Fabric's OptiFine). Based on player count: per 8 players.

2

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Fabric's OptiFine" and click "Install". The fabric loader and Minecraft 1.21.10 are configured automatically.

3

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Fabric's OptiFine server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Fabric's OptiFine server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).

Can I add custom mods to Fabric's OptiFine without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.10). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Fabric's OptiFine server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.

Rent Fabric's OptiFine Server

Start your own server with automatic modpack installation.

Recommended RAM:
6 GB(min. 4 GB)
From 8.00 / month
Create Server Now
1-Click Modpack Install
NVMe SSD Storage
DDoS Protection included
Automatic Backups

Details

License
LicenseRef-All-Rights-Reserved
Server-side
Unsupported
Client-side
Required

Supported Versions

1.21.101.21.81.20.1

Start your Fabric's OptiFine Server now

From €8.00/month with 6 GB RAM for the best performance.

Configure Server →