> For the complete documentation index, see [llms.txt](https://docs.osmos.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.osmos.io/developer-docs/parser-webhook-for-file-based-connectors.md).

# Parser Webhook for file based connectors

A **parser webhook** is used to pre-process source data before it goes through an Osmos Pipeline.   An example includes combining multiple rows. 

{% hint style="info" %}
Parser webhooks are only available in Source Connectors, and hence usable only with Pipelines.
{% endhint %}

{% embed url="<https://github.com/Osmos-io/examples/tree/main/examples/parser-webhook-csv>" %}
Parser Webhook Example
{% endembed %}

{% embed url="<https://github.com/Osmos-io/examples/tree/main/examples/parser-webhook-fixed-width>" %}
Parser Webhook Fixed Width Example
{% endembed %}


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