Show HN: I made a tool which generates a sitemap automatically

Made this after being frustrated with existing tools with similar functionality, which either do no adhere to the standard/do other weird stuff. Anybody have some feedback for functionality they feel are missing?

Still want to add:

-automatic generating hreflang elements

-make it a bit faster

-support for larger sitemaps.

-make it look nicer( I know almost nothing about making nice-looking software)

-add support for recieving a link to the results by e-mail when the crawling is done

Doesn't seem to work with SPAs