LogFilter

A highly configurable log filtering mod for Minecraft. Suppress noisy log messages, highlight important ones, and keep your console clean, all with hot-reloadable rules.

Wiki: https://tysontheember.dev/log-filter/intro/

Features

Regex message filtering: Match and suppress log messages by content using regular expressions
Logger name filtering: Filter by exact logger name or regex pattern, with hierarchical matching
Log level filtering: Target specific log levels (DEBUG, INFO, WARN, ERROR)
Filter actions: DENY (suppress), ALLOW (force show), or NEUTRAL (pass through) per rule
Per-rule enable/disable: Toggle individual rules without removing them
Hot-reload: Edit logfilter.json and changes apply instantly, no restart needed
Default rules included: Ships with pre-made (disabled) rules for common log spam

Configuration

LogFilter stores its config in logfilter.json in your Minecraft config directory. The file is created automatically on first launch with sensible defaults.

Example Config

{ "configVersion": 1, "enabled": true, "rules": [ { "name": "Suppress OpenAL spam", "enabled": true, "type": "MESSAGE_REGEX", "pattern": "(?i)openal", "action": "DENY", "level": null }, { "name": "Block debug logs from server level", "enabled": true, "type": "LOGGER_NAME", "pattern": "net.minecraft.server.level", "action": "DENY", "level": "DEBUG" }, { "name": "Always show errors", "enabled": true, "type": "LEVEL", "pattern": "ERROR", "action": "ALLOW", "level": null } ] }

Rule Types

Type Description MESSAGE_REGEX Match the log message content against a regex pattern LOGGER_NAME Match by exact logger name or prefix (hierarchical) LOGGER_REGEX Match logger names using a regex pattern LEVEL Match by log level (DEBUG, INFO, WARN, ERROR)

Actions

Action Description DENY Suppress the log message ALLOW Force the message through, regardless of other rules NEUTRAL No effect, pass through to the next rule

Optional Level Restriction

Any rule can include a level field to restrict it to a specific log level. For example, a LOGGER_NAME rule with "level": "DEBUG" will only match debug messages from that logger.