ChatHighliter

Words on the forbidden list are highlighted automatically as they appear in chat. Each word can be shown in one of 16 colors, such as red, blue or gold, and can be set to bold or italic. The word list, the colors and the formatting are all changed in a simple config file, and sound notifications can be enabled for matches.

The mod runs only on the client. Players install it themselves and servers do not need it, and a server that does not run it still works normally for everyone else. Builds are published for Fabric, covering the game versions 1.20 – 1.21.5 across 13 release versions, under the CC0 1.0 Universal license. The code is not open source, and the latest Fabric file, 1.0.0-mc1.20, targets 1.20.6 and was released on 2025-04-09.

Players who moderate or watch busy public chats can use it to catch banned terms, and players on a server with a word rule can see where a rule was broken without reading every line. No required dependency is listed for Fabric.