Cosmorph

Cosmorph is a Fabric client-side mod that lets you customize item names and models in-game without resource packs. Changes are purely visual and only affect your client. Currently, items must have a UUID in their custom_data component to apply.

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Rent Server with this Mod

About this Mod

Cosmorph is a lightweight Fabric client-side mod that lets players customize item names and models directly in-game. It provides a simple way to personalize items, making it ideal for visual tweaks, roleplay, or better inventory organization. All changes are client-side, so they don’t affect gameplay mechanics or other players unless they’re using the same configuration.

Currently, Cosmorph identifies customized items using a UUID stored in the custom_data component. This UUID acts as a unique identifier, allowing the mod to correctly apply custom names and models to specific items. While this system ensures reliable mapping between items and their visual overrides, it also means each item must be assigned a UUID for the customization to take effect.

Available Versions

Cosmorph 1.1.0release

MC 1.21.10, 1.21.11fabric

March 31, 2026

How to Install Cosmorph 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 (1.21.11).

Install Mod

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

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.10

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Cosmorph 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 (1.21.11). You can switch loaders with one click in the panel.

Is Cosmorph compatible with fabric?

Cosmorph officially supports fabric for Minecraft 1.21.11, 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Cosmorph – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Cosmorph 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.