Chatcryption
by Pillow
Chatcryption encrypts whispers sent between Chatcryption users with end-to-end encryption, and it is published for Fabric 1.21.11.
What it does
Chatcryption works by replacing the default whisper command with an end-to-end encrypted message. Its default msg command sends messages that only the sender and the recipient can read. When the recipient does not have the mod installed, the first message explains that the conversation is encrypted and what installing Chatcryption would do. Encrypted parts are sent with a 400 millisecond wait between them, and the feature can be switched on or off in-game with chatcryption on|off, where it is enabled by default.
The mod works with the Essentials X messaging system by default, so the list, messaging and replying commands follow Essentials X conventions and do not change vanilla behavior. The mod needs Fabric API and runs on the client alone, so servers need nothing installed. It is released under the GNU General Public License v3.0 only, and it is open source, with the source code publicly available. Files exist for Fabric for 1.21.11, the single game version the mod targets.
Key features
Encrypted whispers
Whispers sent through the mod are end-to-end encrypted, so only the two players in the conversation can read them.
Essentials X commands
The list, messaging and replying commands follow the defaults of the Essentials X messaging system.
Initial explanation message
The first message tells a recipient who lacks Chatcryption what the encryption is and why installing it helps.
Toggle in-game
The mod is enabled by default and can be turned on or off in-game with chatcryption on|off.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Who it’s for: Players who want private messages on a server running Essentials X, and players who do not want their whispers readable by others.
How it compares
Personal Messages is server-side only, open source under the MIT License and built for 1.21.1, so players can join without installing anything. Hide Player List is a client and server mod under All rights reserved and is not open source, with a build for 1.21.10. ChatPing is server-side only and open source under the MIT License, covering 1.21.8 – 1.21.10. Chatcryption is client-side only, so the server does not run it, and it is open source under the GNU General Public License v3.0 only, with a build for 1.21.11.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Chatcryption | Fabric | 1.21.11 | Client-side only | 2026-03-17 |
| Personal Messages | Fabric | 1.21.1 | Server-side only | 2025-07-02 |
| Hide Player List | Fabric | 1.21.10 | Client and server | 2025-11-27 |
| ChatPing | Fabric | 1.21.8 – 1.21.10 | Server-side only | 2025-11-26 |
Questions
Does Chatcryption need Fabric API?
Do servers need Chatcryption installed?
Is the encryption secure against determined attackers?
In the catalog
Chatcryption is one of 5,392 Social mods on ModsFinder, and one of 4,084 Social mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Pillow
Similar mods
What the author says
By default, will only work on the Essentials(X) message system. (e.g.[sender -> me]: message) The configuration file is [minecraft directory]/config/chatcryption-config.json
Official listing
- Modrinth page
- modrinth.com/mod/chatcryption
- Owner
- Pillow
- Published
- 2026-03-17
- Updated on Modrinth
- 2026-03-17
- Facts verified
- 2026-10-15