| ProcessorInterface | An optional interface to allow labelling Monolog processors. |
| GitProcessor | Injects Git branch and Git commit SHA in all records |
| HostnameProcessor | Injects value of gethostname in all records |
| IntrospectionProcessor | Injects line/file:class/function where the log message came from |
| MemoryPeakUsageProcessor | Injects memory_get_peak_usage in all records |
| MemoryProcessor | Some methods that are common for all memory processors |
| MemoryUsageProcessor | Injects memory_get_usage in all records |
| MercurialProcessor | Injects Hg branch and Hg revision number in all records |
| ProcessIdProcessor | Adds value of getmypid into records |
| PsrLogMessageProcessor | Processes a record's message according to PSR-3 rules |
| TagProcessor | Adds a tags array into record |
| UidProcessor | Adds a unique identifier into records |
| WebProcessor | Injects url/method and remote IP of the current web request in all records |