Log Sifter
by MC_Nirvana
Log Sifter, a NeoForge optimization mod for 1.21.1, filters out repetitive or unwanted lines from the game's log output using rules set in configuration files.
What it does
Players and server owners who find the console or log file cluttered with noisy messages can define rules that suppress specific log entries. Rules live in configuration files and are created automatically the first time the game starts, in the config directory. Changes to the filtering rules take effect at runtime, so the game does not need a restart to apply them.
The mod is built to change only log management and leaves other game systems untouched, which keeps its footprint small. It is released for NeoForge on Minecraft 1.21.1 under the MIT License as open source. Because either side can run it, the file can sit in the mods folder of a client, a server, or both, and neither side needs it.
Key features
Log filtering
Specific log outputs are removed from the console and log file based on rules the user defines in configuration.
Regular expression matching
Rules can match log content precisely with regular expressions, so a single pattern can cover a family of messages.
Runtime rule loading
Filtering rules are loaded and applied while the game runs, so edits take effect without restarting the game.
Automatic default configuration
A default configuration file is generated in the config directory on first launch, giving a starting point for custom rules.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Quieting a noisy console
A server owner can hide repeated messages that fill the console and bury more important entries.
Reading a log file
A player who reads the log to debug a problem can remove unrelated lines so the relevant ones stand out.
Who it’s for: Players who run a noisy modpack and server owners who want a cleaner console or log file. Anyone who needs to inspect logs closely while keeping relevant output intact will benefit from precise rules.
Questions
Which loader does Log Sifter support?
Does Log Sifter have to be installed on a server?
Are filtering rules applied after a restart?
In the catalog
Log Sifter is one of 3,545 Optimization mods on ModsFinder, and one of 1,250 Optimization mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
More from MC_Nirvana
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/log-sifter
- Owner
- MC_Nirvana
- Published
- 2025-09-05
- Updated on Modrinth
- 2026-04-18
- Facts verified
- 2026-10-15