Change Pretty URLs to Ugly URL?

Hiya! Is it possible to change the url structure for example from /page-name/ to /page-name.html ? And for subpages /main-page/subpage.html
I want to migrate an old existing site with good google-rankings and don't want to change anything regarding the URLs. Also I don't want to start a debate about the sense of using legacy URLs again :-)) So, is this possible? Thanks!

You can add in Slugs to your md file to change that.

A better solution would be to 301 redirect the old url's to the new ones (server level/htacess). Google will honour the 301 redirect and several days later old listing will disappear and new one will appear (with seo / page rank moved to the new location).

BTW, what you asking for is already there. Grav supports filename extensions, but as the default is .html this is optional. So

/some-page

and

/some-page.html

will display the same page.

Hi. So you mean it doesn't matter when I go live with the site? I would not need to do 301 redirects in my case? If so...how do I set this up? If I type the page URL with .html I get "The requested resource /mypage.html was not found on this server."

It should just work, for example:

http://getgrav.org/blog/grav-0.9.27-released.html

is the same as:

http://getgrav.org/blog/grav-0.9.27-released

FYI, this probably will not work on aliases you have configured in site.yaml, this is for actual pages only.