> For the complete documentation index, see [llms.txt](https://docs.feedotter.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.feedotter.com/set-up-your-own-template/advanced-template-information/filters.md).

# Filters

FeedOtter uses the TWIG template language in our email code.  As a result many common patterns and template operators are allowed.

Here are the most common filters used in FeedOtter emails:

{% content-ref url="/pages/6Brheuo3PsXFiCyIM1m9" %}
[Broken mention](broken://pages/6Brheuo3PsXFiCyIM1m9)
{% endcontent-ref %}

{% content-ref url="/pages/rpnXKLr1oGH6aEoPw6lA" %}
[Broken mention](broken://pages/rpnXKLr1oGH6aEoPw6lA)
{% endcontent-ref %}

{% content-ref url="/pages/p73G0mjsrTZT2roH4JM5" %}
[Broken mention](broken://pages/p73G0mjsrTZT2roH4JM5)
{% endcontent-ref %}

In addition to these special filters, most anything allowed in the TWIG language can be used in FeedOtter email templates.  Check out the TWIG documentation for more ideas.

{% embed url="<https://twig.symfony.com/doc/3.x/>" %}