CoolClient

BlockOutline, Custom Hitbox, Hit Damage Color, Custom Crosshair & PvP Utilities

5 Downloads

fabricutility

Rent Server with this Mod

Screenshots

About this Mod

Take full control of your PvP experience with this feature-packed Minecraft client. Customize your visual feedback with BlockOutline, fine-tune Hitbox precision, personalize Hit Damage Colors, and craft the perfect Crosshair — plus a suite of utilities to enhance your gameplay.

Available Versions

CoolClient 1.0-SNAPSHOTbeta

MC 1.21.1fabric

June 26, 2026

How to Install CoolClient on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).

Install Mod

Open the mod browser in the dashboard and search for "CoolClient". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.1

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

CoolClient server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is CoolClient compatible with fabric?

CoolClient officially supports fabric for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with CoolClient – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if CoolClient consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.