Versions | v1.0 (td-agent3) | v0.12 (td-agent2)

json Formatter Plugin

The json formatter plugin converts an event to json.

By default, json formatter result doesn’t contain tag and time field.

Table of Contents


add_newline (Boolean, Optional, defaults to true)

Add \n to the result.

include_time_key (Boolean, Optional, defaults to false)

If true, the time field (as specified by the time_key parameter) is kept in the record.

time_key (String, Optional, defaults to “time”)

The field name for the time key.

time_format (String. Optional)

By default, the output format is iso8601 (e.g. “2008-02-01T21:41:49”). One can specify their own format with this parameter.

include_tag_key (Boolean. Optional, defaults to false)

If true, the tag field (as specified by the tag_key parameter) is kept in the record.

tag_key (String, Optional, defaults to “tag”)

The field name for the tag key.

localtime (Boolean. Optional, defaults to true)

If true, use local time. Otherwise, UTC is used. This parameter is overwritten by the utc parameter.

timezone (String. Optional)

By setting this parameter, one can parse the time value in the specified timezone. The following formats are accepted:

  1. [+-]HH:MM (e.g. “+09:00”)
  2. [+-]HHMM (e.g. “+0900”)
  3. [+-]HH (e.g. “+09”)
  4. Region/Zone (e.g. “Asia/Tokyo”)
  5. Region/Zone/Zone (e.g. “America/Argentina/Buenos_Aires”)

The timezone set in this parameter takes precedence over localtime**, e.g., if localtime is set to true but timezone is set to +0000, UTC would be used.

time_as_epoch (Boolean, Optional, defaults to false)

Set integer event time instead of stringanized time to time_key.


tag:    app.event
time:   1362020400
record: {"host":"","size":777,"method":"PUT"}

This incoming event is formatted to:


With include_tag_key true and tag_key event_tag, result is:

Last updated: 2019-03-22 16:18:32 +0000

Versions | v1.0 (td-agent3) | v0.12 (td-agent2)

If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is a open source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.