NameProtect

Client-side Minecraft mod for Fabric 1.21.4. Filters and replaces nicknames and chat text on your screen using custom rules. Server sees nothing - purely visual, runs only on your client.

Features

• Nickname filtering - replaces matching player names in chat, tab list, nameplates above heads, and team-colored displays
• Chat replacement - applies rules to all incoming chat messages
• Custom rules - define any number of word → replacement pairs
• Case-insensitive matching - rule noob matches NOOB, Noob, nOoB
• Unicode support - works with non-ASCII names (Cyrillic, etc.)
• Live config - rules persist in JSON, reload without restart
• Zero server impact - pure client-side mixins, no packets sent

Commands

All commands run client-side under /nameprotect:

Command	Action
/nameprotect set <word> <replacement>	Add or update a rule
/nameprotect remove <word>	Delete a rule
/nameprotect list	Show all active rules
/nameprotect reload	Reload config from disk
/nameprotect clear	Remove all rules

Example

/nameprotect set Notch SteveTheLegend
/nameprotect set badword ***

After this, any occurrence of "Notch" in chat or above heads renders as "SteveTheLegend", and "badword" becomes "***".

Config

Rules stored at .minecraft/config/nameprotect.json:

{
  "notch": "SteveTheLegend",
  "badword": "***"
}

You can edit this file directly, then run /nameprotect reload.

Requirements

• Minecraft 1.21.4
• Fabric Loader 0.16.0+
• Fabric API
• Java 21

Installation

1. Install Fabric Loader for 1.21.4
2. Drop Fabric API into mods/
3. Drop NameProtect jar into mods/
4. Launch - use /nameprotect in-game

Notes

• Client-side only - does not work on the server side, does not need to be on the server
• No mixin conflicts known with major mods
• Rules apply to display only - chat history files store original text

License

MIT - Reizoo