ChatPurity

1. 01

   Whitelist and blacklist

   Word lists can allow or forbid terms, with exact, containment and regular expression matching for whitelist entries.

2. 02

   Homophone and pinyin detection

   Messages are checked for homophone characters and for pinyin abbreviations and full pinyin, not only for literal spelling.

3. 03

   Single-character and repeat checks

   Single characters and exactly repeated words can be detected, so variants that avoid whole-word matches are still caught.

4. 04

   Replacement and blocking

   Sensitive words can be replaced in the message instead of blocking it, or the whole message can be stopped.

5. 05

   Permission tiers

   Rules can block messages from players below OP1 to OP4 levels, so staff tiers can speak where lower tiers cannot.

6. 06

   Timed penalties

   Mute or block durations accept seconds, minutes, hours, days, or -1 for a permanent penalty.

PC Easy Server Manage is also server-side only and open source under the CC0 1.0 Universal license, with files for 1.20.1 – 26.2, so it covers a wider version range but is a general server manager rather than a chat filter. LAN Whitelist is open source under the MIT License and is needed on both client and server, for 1.20.2 – 1.21.10, so it controls who can join, not what is said. Simple Whitelist is server-side only and open source under the MIT License for 1.18 – 26.2, and manages join access rather than chat content.

ChatPurity is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 19,862 mods support Minecraft 1.21.11.