# How to Generate logs in json format using .yml file
**URL:** https://discuss.elastic.co/t/how-to-generate-logs-in-json-format-using-yml-file/124575
**Category:** Logstash
**Created:** [March 19, 2018, 2:30pm UTC](https://discuss.elastic.co/t/how-to-generate-logs-in-json-format-using-yml-file/124575 "2018-03-19T14:30:52Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rkhapre](https://discuss.elastic.co/u/rkhapre)
#### Post date: [March 19, 2018, 2:30pm UTC](https://discuss.elastic.co/t/how-to-generate-logs-in-json-format-using-yml-file/124575/1 "2018-03-19T14:30:52Z")
Hi
I am uisng LS 5.2.2 version, i am able to generate logs in json format using command line like this
```
/bin> logstash.bat --debug -f xyz.conf --log.format json
```
i want to generate the json logs through control of logstash.yml file, i have added below line in the yml file, but it does not work
> `log.format : json`
and i use this below while running pipeline
> /bin\> logstash.bat --debug -f xyz.conf
Please let me know the right entry in .yml file, as i have followed the documentation.
I have followed the documentation of LS 5.2.2,not sure if this a bug
---
### Author:  [@rkhapre](https://discuss.elastic.co/u/rkhapre)
#### Post date: [March 31, 2018, 3:56am UTC](https://discuss.elastic.co/t/how-to-generate-logs-in-json-format-using-yml-file/124575/2 "2018-03-31T03:56:45Z")
Hi
Did,anyone has experienced this?
Can we do this via yml file?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 28, 2018, 3:56am UTC](https://discuss.elastic.co/t/how-to-generate-logs-in-json-format-using-yml-file/124575/3 "2018-04-28T03:56:46Z")
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