Not easily. <!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>Foo</title> <style> html

Not easily. <!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>Foo</title> <style> html {height: 100%;} body {height: 100%;} .mid {display: inline-block; vertical-align: middle;} /*body:before {content: ''; height: 100%; display: inline-block; vertical-align: middle;}*/ </style> </head> <body> <div class="mid">vertically aligned</div> </body> </html> would be easily, but you need to uncomment that last rule before it "works", and that is just ugly. And when that last rule is uncommented, viewport now has scrollbar for some reason that I did not have motivation to investigate. Like chii said, that's because CSS is a language for styling, not for layouts.