This is really a HTML question, not a perl one. Basically, PRE is your best bet. Every browser displays things differently, so there are never any guarantees that things will line up the way you want them. If it's just numbers, then PRE *should* be lining things up correctly. Tables, of course, will force things to line up, but it can be a pain. (Use of the &nbsp; character to simulate the extra spaces is not recommended - it will not line up for most browsers) You could also try using the <CODE> tag which causes most browsers to use a fixed-width font, which will line up quite nicely.