Carpet Fixes (unofficial port)
by skrizzzz
Carpet Fixes is an unofficial 1.21.11 port of a Fabric Carpet extension that corrects a set of vanilla Minecraft bugs affecting redstone, mobs and world behavior.
What it does
The mod targets Fabric Carpet and fixes vanilla behavior in areas such as redstone update order, item duplication, mob and entity behavior, pistons, observers, rails and explosions, including a corrected TNT exposure calculation. It also keeps spawn chunks loaded, restores saved brewing time, and handles bugs such as creeper portal fuse timing, blue wither skulls and bubble column unloading. The fix list is described as 246 fixes in total, and some of them can be turned on or off with a rule toggle.
Carpet Fixes requires Carpet, and a newer Carpet build than the one it was tested against is needed, along with Fabric API. The mod runs on both client and server, so both sides need it. It is distributed for Fabric only, with a single build for 1.21.11, and works in singleplayer and multiplayer. The port is based on the 1.21 fork by tomalbrc and was tested in-game to confirm it loads without mixin errors. Its source is under the MIT License, copyright 2020 Fx Morin.
Key features
Redstone and piston fixes
Corrections to redstone update order, piston and observer behavior, and rail handling remove several known vanilla quirks.
Duplication and explosion fixes
Known item duplication paths and the TNT exposure calculation are adjusted to match the intended vanilla behavior.
Mob and entity fixes
Creeper portal fuse timing, blue wither skull handling and other mob and entity behaviors are corrected.
Rule-toggleable fixes
Several fixes can be switched on or off through Carpet rules, so server owners choose which corrections apply.
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 and server owners who already use Fabric Carpet on Minecraft 1.21.11 and want vanilla bug corrections alongside the rules Carpet provides.
How it compares
Carpet-YBS-Addition runs on Fabric for 1.21 – 1.21.1 with a client and server environment, under the MIT License. Carpet PVP is server-side only, covers 1.21 – 1.21.5 on Fabric, and is also MIT licensed. Carpet Roxy Addition is server-side only, built for 1.21.11 on Fabric, and open source under the MIT License, so it is the closest match in version. Carpet Fixes is open source under the MIT License as well and needs both sides to run.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Carpet Fixes (unofficial port) | Fabric | 1.21.11 | Client and server | 2026-06-29 |
| Carpet-YBS-Addition | Fabric | 1.21 – 1.21.1 | Client and server | 2025-10-04 |
| Carpet PVP | Fabric | 1.21 – 1.21.5 | Server-side only | 2026-01-16 |
| Carpet Roxy Addition | Fabric | 1.21.11 | Server-side only | 2026-06-30 |
Questions
Does Carpet Fixes need Carpet installed?
Does the server need Carpet Fixes?
Which Minecraft version is supported?
Can every fix be disabled?
In the catalog
Carpet Fixes (unofficial port) is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
Unofficial port of Carpet Fixes to Minecraft 1.21.11. Carpet Fixes is a Fabric Carpet extension that fixes as many vanilla Minecraft bugs as possible — redstone update order, dupes, mob behaviour, pistons, observers, rails, explosions and much more. Every fix is a toggleable rule.
Official listing
- Modrinth page
- modrinth.com/mod/carpet-fixes-1.21.11-port
- Owner
- skrizzzz
- Published
- 2026-06-29
- Updated on Modrinth
- 2026-06-29
- Facts verified
- 2026-10-15