debug-helper
debug-helper is a server-side Fabric and Quilt library that other mods use for logging, tracing and debugging utilities.
What it does
The library prints debug messages to the server console and tracks event triggers, so a developer can follow how code runs during development. Its logging, tracing and debugging helpers are meant to be called from other mods rather than used directly by players.
Only the server needs debug-helper, and clients join without installing it. Fabric API is required, and Quilted Fabric API or Quilt Standard Libraries is required on Quilt. The Apache License 2.0 covers the code, which is not open source. Builds target 1.20.1 – 1.21.8 on Fabric and Quilt, and the library itself is required by tweak-api.
Key features
Console debug messages
Debug messages are written to the server console, which keeps output visible while the server runs.
Event trigger tracking
Event triggers are recorded as they fire, so a developer can see which events occurred and in what order.
Code flow monitoring
Monitoring helps a developer trace the flow of a mod's code while it is being built and tested.
Simple logging utilities
Plain logging and tracing helpers can be called from other mods without extra setup beyond the dependencies.
Compatibility
Latest build for each game version and loader.
1.21.x9 of 9 versions with builds
1.20.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Required by 1 mod
Use cases
Mod development
A Fabric mod author can add debug-helper as a dependency to log messages and track triggers while testing.
Server debugging
Server owners running a mod that depends on debug-helper can read its output in the server console.
Who it’s for: Mod developers building Fabric or Quilt mods who want a logging and tracing library, and server owners who need its console output while diagnosing a mod that uses it.
How it compares
Triggers is also server-side only and open source under the MIT License, with files for Fabric, Forge and NeoForge across 1.20.1 – 1.21.1, so it covers more loaders than debug-helper. Sparkweave Engine is a Fabric, NeoForge and Quilt mod that can run on a client or a server, and it is published for 1.20.1 – 26.1.2 under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| debug-helper | Fabric and Quilt | 1.20.1 – 1.21.8 | Server-side only | 2025-09-10 |
| Triggers | Fabric, Forge and NeoForge | 1.20.1 – 1.21.1 | Server-side only | 2026-04-28 |
| Sparkweave Engine | Fabric, NeoForge and Quilt | 1.20.1 – 26.1.2 | Client or server, optional | 2026-10-11 |
Questions
Does debug-helper need Fabric API?
Does a player need debug-helper to join a server that runs it?
Which game versions does debug-helper support?
In the catalog
debug-helper is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from zhengzhengyiyiMC
Similar mods
What the author says
DebugHelper provides simple logging, tracing, and debugging utilities that other mods can use to: - Print debug messages to the server console - Track event triggers - Monitor code flow during development If you're developing a Fabric mod and want to use DebugHelper for debugging, follow these steps.
Official listing
- Modrinth page
- modrinth.com/mod/debug-helper
- Owner
- zhengzhengyiyiMC
- Published
- 2025-09-06
- Updated on Modrinth
- 2025-09-10
- Facts verified
- 2026-10-15