I want change my .html site

[pagebag]

I want to change my . html  website www.pagebag.com into WordPress and I want  keep my file in .html  format

[SiteGeek]

If you want to convert your site to WordPress, you cannot "keep it in HTML format". WordPress pages are dynamically-generated using PHP.

Any HTML site can be converted into a WordPress site. Some are easier to convert than others.

Google "convert HTML to WordPress" and you'll be deluged with tutorials and articles. 

Of course, if you just want to display a few static HTML pages within your WordPress site, just add them to a Menu or Menus.