While there are many filters provided with Jinja2, Ansible includes some additional filters that playbook authors may find particularly useful. Again, there are more than we can go into in this book, but we'll outline a few key ones here.
These custom filters in Ansible change often between releases, and are worth reviewing, especially if you make heavy use of them. A full list of the custom Ansible filters is available here: https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html.