| FormatterInterface | Interface for formatters |
| ChromePHPFormatter | Formats a log message according to the ChromePHP array format |
| ElasticsearchFormatter | Format a log message into an Elasticsearch record |
| FlowdockFormatter | formats the record to be used in the FlowdockHandler |
| FluentdFormatter | Class FluentdFormatter |
| LogglyFormatter | Encodes message information into JSON in a format compatible with Loggly. |
| MongoDBFormatter | Formats a record for use with the MongoDBHandler. |
| ScalarFormatter | Formats data into an associative array of scalar values. |