# 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="broken-reference" %}
[Broken link](https://docs.feedotter.com/set-up-your-own-template/advanced-template-information/broken-reference)
{% endcontent-ref %}

{% content-ref url="broken-reference" %}
[Broken link](https://docs.feedotter.com/set-up-your-own-template/advanced-template-information/broken-reference)
{% endcontent-ref %}

{% content-ref url="broken-reference" %}
[Broken link](https://docs.feedotter.com/set-up-your-own-template/advanced-template-information/broken-reference)
{% 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/>" %}