String Optimizer

String Optimizer

Clumps nearby stacks of strings together to improve your performance.

by
15.7K Downloads
fabricoptimization
Configure a Compatible Minecraft Server

About this Mod

If 2 or more stacks of string are near each other, they will combine into one.

Client-Sided, works on servers. Improves performance greatly and is a must have for servers where string is a necessity.

Available Versions

StringPerformance 1.21.11release
MC 1.21.11fabric
February 21, 2026
StringPerformance 1.21.10release
MC 1.21.10fabric
November 2, 2025
StringPerformance 1.21.9release
MC 1.21.9fabric
November 2, 2025
StringPerformance 1.21.8release
MC 1.21.8fabric
November 2, 2025
StringPerformance 1.21.7release
MC 1.21.7fabric
November 2, 2025

How to Install String Optimizer on Your Client

1

Install the Mod Loader Locally

Install fabric for your local Minecraft version.

2

Download the Matching File

Choose the String Optimizer file for fabric and Minecraft 1.21.11.

3

Install Mod

Place the .jar file in your local .minecraft/mods folder and restart Minecraft. No server-side installation is required.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+9 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Does String Optimizer need to be installed on the Minecraft server?

No. Modrinth marks String Optimizer as unsupported on the server side. Install it only in your local Minecraft mods folder. Your server can remain unchanged unless the mod page lists an additional dependency.

Which version and loader does String Optimizer require?

Use a file for fabric and your exact Minecraft version. Supported versions include 1.21.11, 1.21.10, 1.21.9. Files for different loaders are not interchangeable.

String Optimizer is not working – what should I check?

First check the Minecraft version, loader version and required dependencies. Put the .jar file in your local .minecraft/mods folder and remove older duplicates. Because this mod is client-side, adding server RAM will not fix it.

Minecraft Server for Your Group

String Optimizer stays on your client. Host a compatible world for your group.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
Create Server Now
Client Compatibility Guide
NVMe SSD Storage
DDoS Protection included

Details

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

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.2+2 more