I realize that every once a while when I create a website, there is always a tiny little blank space on the right of the page.
Can’t really figure what is the root of the problem in css. Some said it is the browser issue. But I think there is a fix. Does anyone know why it is like that and how to do it?
Thanks in advance.
Please see the right side of the area in gray color below:

How to make the gray area to disappear?
You possibly need to use some sort of CSS Reset style sheet if you haven’t already. Try inserting one of the options from here into your CSS. It will most likely mess up a few things, but once you correct the issues, everything should be more or less normalised across the browsers.
One of the things they do is reset
<body>andwindowmargins/padding etc. which would possibly fix the issue you’re having.