LogSpy
by Gotlicked
LogSpy is a log-filtering mod for Fabric and NeoForge that tags each log line with the mod that printed it and silences repetitive messages.
What it does
Some mods flood the logger with repeated, unnecessary messages, and that output costs processing time on both the client and the server. LogSpy targets those repeats: when the same message keeps being printed rapidly, it is reduced so the log stays readable and the processor is spent on more important work. Intercepting unhandled exceptions is part of the same pass, so errors reach the log in a consistent form.
LogSpy adds a prefix to each message that names the mod printing the line, which makes it easier to see where a message came from during startup or play. Its effect is limited to the log output: it only silences repeats and does not change gameplay. The included log snippets show the same startup period with and without the mod, and the only difference is whether LogSpy is installed. It works in singleplayer, multiplayer and on dedicated servers.
Either side can run LogSpy, and neither needs it. LogSpy is published for Fabric and NeoForge, with files for 26.1.2 only. Both the Fabric and NeoForge builds were released on 2026-06-01 as version 2.0.0. The project is released under the MIT License and is open source, and its source code and issue tracker are public.
Key features
Repeated message reduction
Identical messages that repeat rapidly are silenced, so they stop filling the log and consuming processing power.
Source mod prefix
Each log line receives a prefix naming the mod that printed it, so the origin of a message is clear at a glance.
Unhandled exception interception
Unhandled exceptions are caught and written to the log, giving a single place to look when something fails.
Startup log comparison
Log snippets from the same startup period show the mod's effect, with the only difference being whether it is installed.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Reading logs on a busy modpack
Players who run large modpacks can use the prefixes to find which mod produced a given line.
Server performance
Server owners whose logs are flooded by a few noisy mods can reduce the repeated output on the server side.
Who it’s for: Players and server owners who run Minecraft 26.1.2 with Fabric or NeoForge and want quieter, more readable logs. Because the mod only changes log output, it suits both single-player sessions and multiplayer servers.
Questions
Which loaders does LogSpy support?
Does LogSpy need to be installed on the server?
Does LogSpy change gameplay?
More from Gotlicked
What the author says
LogSpy is a performance oriented mod that reduces log spam. And therefore increasing server and client performance by removing similar repeating log messages that are rapidly printed by some mods, overloading the logger with unnecessary tasks. It also adds a prefix for every message, clarifying which mod is printing…
Official listing
- Modrinth page
- modrinth.com/mod/logspy
- Owner
- Gotlicked
- Published
- 2026-05-30
- Updated on Modrinth
- 2026-06-01
- Facts verified
- 2026-10-15