# json

The `json` parser plugin parses JSON logs. One JSON map per line.

## Parameters

### time\_key

Specify time field for event time. Default is `time`.

If there is no time field in the record, this parser uses current time as an event time.

### time\_format

If time field value is formatted string, e.g. "28/Feb/2013:12:00:00 +0900", you need to specify this parameter to parse it.

Default is `nil` and it means time field value is a second integer like `1497915137`.

See [Time#strptime](http://ruby-doc.org/stdlib-2.4.1/libdoc/time/rdoc/Time.html#method-c-strptime) for additional format information.

### keep\_time\_key

If you want to keep time field in the record, set `true`. Default is `false`.

## Example

```
{"time":1362020400,"host":"192.168.0.1","size":777,"method":"PUT"}
```

This incoming event is parsed as:

```
time:
1362020400 (2013-02-28 12:00:00 +0900)

record:
{
  "host"  : "192.168.0.1",
  "size"  : 777,
  "method": "PUT",
}
```

If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is a open source project under [Cloud Native Computing Foundation (CNCF)](https://cncf.io/). All components are available under the Apache 2 License.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fluentd.org/0.12/parser/json.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.