ChatFS
by al2m
ChatFS lets players send files, folders and screenshots to each other through the in-game chat, with a paperclip button added to the chat screen.
What it does
Players attach a file from the chat screen and send it to the other players on the server. Attachments up to 50 MB can be sent directly, and larger transfers are queued by a stream manager that the server uses to limit load. A folder is archived to a ZIP file automatically before it is sent, so an entire build or set of schematics can travel as one item. Files can be chosen through the native operating system file picker, through a Browse button, or by dragging them onto the chat window.
The mod is built around Fabric and NeoForge and covers Minecraft 1.21 – 1.21.11, with 12 release versions in total. Compression uses a native Zstd library, which the author describes as reaching up to 3 GB/s. A server running it needs every connecting player to have it too. ChatFS is not open source and is released under All rights reserved. No required dependency is listed for Fabric and NeoForge.
Key features
Direct file sending
Players send files and images into the chat, where other players receive them as attachments.
Folder archiving
Folders are compressed into a ZIP archive automatically before sending, so whole projects move in one step.
Drag and drop
Files dropped anywhere on the chat screen are added to the outgoing transfer.
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Sharing schematics
Players send .litematic schematic files to a building partner without leaving the game.
Sharing screenshots
Screenshots can be sent to other players in chat, one file at a time or as a folder archive.
Who it’s for: Multiplayer communities and build teams that trade schematics, screenshots and project folders, and server owners who want file sharing with a transfer limit.
How it compares
Chat images is a Fabric mod for 1.21.11 that is also client and server, but it is released under All rights reserved and handles images only. LinearReader is server-side only, open source under the MIT License, and covers 1.20 – 26.3 on Fabric, Forge and NeoForge. ChatFS sends general files and folders, and it needs both sides installed.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| ChatFS | Fabric and NeoForge | 1.21 – 1.21.11 | Client and server | 2026-08-13 |
| Chat images | Fabric | 1.21.11 | Client and server | 2026-06-18 |
| LinearReader | Fabric, Forge and NeoForge | 1.20 – 26.3 | Server-side only | 2026-09-17 |
Questions
Does ChatFS need to be installed on the server?
Which loaders does ChatFS support?
Is there a size limit on transfers?
In the catalog
ChatFS 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.
Similar mods
What the author says
ChatFS allows players to instantly send files, schematics (.litematic), screenshots, and entire folders directly to each other inside Minecraft via in-game chat!
Official listing
- Modrinth page
- modrinth.com/mod/chatfs
- Owner
- al2m
- Published
- 2026-07-29
- Updated on Modrinth
- 2026-08-13
- Facts verified
- 2026-10-15