Hi there.
I was using dropbox latelty, but I decided to make some changes in my life and... I installed ownCloud. Cutting to the chase. I upload / synhronize some files and one html. When I share it, I get a page with code of this html page. Is there a way to get the link to the file to make it displayable like when I open it from my local dir? I use it to preview graphic design for my clients so I need it working 
Hi,
this "feature" was thoroughly discussed here: https://github.com/owncloud/core/issues/16470 and mostly denied for security reasons: https://github.com/owncloud/core/issues/16470#issuecomment-155356185
Please note ownCloud is not a webserver. If you want to share .html files just use a default webserver and put the files there.