redmon
by ac101m
Redmon is a Fabric utility that draws in-game debug overlays for redstone builds, showing the state of selected blocks while the player works.
What it does
Players mark a reference block, create a profile with a name, and then add signals made up of the blocks they want to watch. A profile maps the world relative to the player's position, so the same design can be applied again wherever it is rebuilt. Missing components or a wrong location show up as error markers in the overlay.
Signals cover repeaters, comparators, torches, redstone dust with its signal strength, and redstone lamps, each shown as on or off. A profile can hold several overlay pages that are cycled through with hotkeys. A small set of hotkeys covers common operations, and they can be configured in the game settings.
Redmon runs on Fabric and is client-side only, so servers and other players do not need it. The code is open source under the MIT License, with a source code repository and an issue tracker. Builds exist for 1.18.2, 1.21.4 and 1.21.8, and the latest file is 1.1.1+1.21.8 for 1.21.8, published 2026-04-26.
Key features
Redstone signal overlays
Repeaters, comparators, torches, dust and lamps are each drawn with their on or off state.
Profiles anchored to a reference
A profile stores signals relative to a marked position, so designs can be reused in other parts of the world.
Multi-page overlays
Additional pages can be added to a profile and cycled through with hotkeys.
Adding signals by looking
A signal is added by looking at a block and running the signal command, which records the chosen blocks.
Overlay and page recall
The overlay can be shown or hidden, and the previous profile page can be recalled.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Debugging computational circuits
Redstone builds meant for computation can be watched block by block while they run.
Reusing a finished design
A saved profile lets a build be checked again after it is moved or copied to another location.
Who it’s for: Redstone builders working on large or computational circuits who want to watch many blocks at once in-game.
How it compares
Debug Options is a Fabric client-side mod released under All rights reserved, not open source, with files for 1.21.9 – 1.21.10. RedstoneHud is a Fabric client-side mod under the MIT License, open source is not claimed, for 1.21.8 – 1.21.11. SoundProfiles is open source under CC0 1.0 Universal and covers 1.20.4 – 1.21.11, but it manages sound settings rather than redstone.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| redmon | Fabric | 1.18.2 – 1.21.8 | Client-side only | 2026-04-26 |
| Debug Options | Fabric | 1.21.9 – 1.21.10 | Client-side only | 2025-09-13 |
| RedstoneHud | Fabric | 1.21.8 – 1.21.11 | Client-side only | 2026-06-18 |
| SoundProfiles | Fabric | 1.20.4 – 1.21.11 | Client-side only | 2025-12-24 |
Questions
Does Redmon need to be installed on a server?
Which loader does Redmon use?
How are overlay profiles kept accurate after a build moves?
In the catalog
redmon is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from ac101m
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What the author says
Redmon is a tool that allows you to create beautiful and functional in-game debug overlays for your redstone projects. The mod has a small number of dedicated hotkeys for common operations.
Official listing
- Modrinth page
- modrinth.com/mod/redmon
- Owner
- ac101m
- Published
- 2026-04-14
- Updated on Modrinth
- 2026-04-26
- Facts verified
- 2026-10-15