hugo/docs/content/en/quick-reference/glossary/output-format.md

title	reference
output format	/templates/output-formats/

An output format is a collection of settings that defines how Hugo renders a file when building a site. For example, html, rss, and json are built-in output formats. You can create multiple output formats and control their generation based on page kind, or by enabling one or more output formats for specific pages.