Tool to list all sub-categories of a particular Mediawiki category

Question

Wikimedia Commons has categories, for instance https://commons.wikimedia.org/wiki/Category:Dogs
This category has sub-categories, and sub-sub-categories, etc.

I want to get a list of all sub-categories.

Is there a tool to get this full list as text for the category of my choice?
Copying from the web interface is not realistic as there are too many arrows to click.

I am especially interested in Wikimedia Commons.

The API has a subcat operation which gets sub-categories: https://commons.wikimedia.org/w/api.php?action=query&list=categorymembers&cmtype=subcat&cmtitle=Category:Dogs&format=json but I would prefer to use an existing tool rather than creating my own, especially given the probable edge cases such as infinite category loops.

• PetScan is not a solution because it returns articles, not categories.
• Search is not a solution because it searches for categories with "dogs" in the name, rather than sub-categories, so it would not find Terriers for instance.

Answer 1

Selecting the Category namespace in the Page properties does the trick:

https://petscan.wmcloud.org/?active_tab=tab_pageprops&minlinks=&namespace_conversion=keep&langs_labels_no=&search_max_results=500&langs_labels_yes=&interface_language=en&links_to_all=&min_sitelink_count=&wikidata_source_sites=&categories=Dogs&cb_labels_yes_l=1&templates_any=&smaller=&maxlinks=&depth=2&edits%5Bflagged%5D=both&manual_list=&max_age=&combination=union&after=&ores_prob_from=&wikidata_label_language=&manual_list_wiki=&ores_prediction=any&ns%5B14%5D=1&output_limit=&cb_labels_any_l=1&referrer_name=&ores_prob_to=&project=wikimedia&show_disambiguation_pages=both&outlinks_yes=&edits%5Bbots%5D=both&before=&sitelinks_yes=&cb_labels_no_l=1&max_sitelink_count=&language=commons&page_image=any&sitelinks_no=&doit=