MessMod
by lovexyn0827
MessMod gathers many debugging and inspection tools for Fabric into one mod, from a key-based entity information display to block state checks and an entity logger.
What it does
Its features cover world manipulation, information display and a set of bug fixes. Players and developers can read entity velocities, counts of stacked entities and the boundary boxes of entities. Some tools sit behind key presses, such as F3 with E on a target entity, while others are shown in a sidebar or a corner of the screen. A tick control lets the game be frozen and stepped one tick at a time, and a block state checker flags blocks that render incorrectly, along with a command that allows or blocks certain entities from stepping onto blocks.
MessMod runs on client and server, so both the server and every player need it. The mod is published for Fabric only, across 22 release versions 1.16.4 – 1.21.3, and the code is open source under the CC0 1.0 Universal license. Its source, issue tracker and wiki are public, and the author's documentation is kept on GitHub in a simplified and a fuller form.
Key features
Entity information display
Real-time information about the entity under the cursor, shown on screen and in the entity sidebar.
Tick control
Freeze the game and advance it one tick at a time, with tools that make tick stepping more convenient.
Boundary boxes and hitboxes
Entity boundary boxes and more accurate hitboxes, including for flying TNT that renders in the wrong position in vanilla.
Block state checker
Checks blocks that render wrongly and helps locate ghost blocks.
Entity logger and counter
Counts stacked entities and writes a simple log of data for chosen entities to a file.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x4 of 4 versions with builds
1.20.x6 of 6 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
1.16.x2 of 2 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does MessMod need to be installed on the server?
Which Minecraft versions does MessMod support?
Where can the mod's documentation be found?
In the catalog
MessMod is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 13,252 mods support Minecraft 1.21.3.
More from lovexyn0827
Similar mods
What the author says
However, that is not everything, the detailed document is on Github. And here is a fairly simplified version (and possibly more grammatical version) of the complete document.
Official listing
- Modrinth page
- modrinth.com/mod/messmod
- Owner
- lovexyn0827
- Published
- 2022-12-23
- Updated on Modrinth
- 2025-10-19
- Facts verified
- 2026-10-15