Do you know a webpage appearance comparator?

Question

I need a tool to compare the design of a website, I do not want to compare the HTML code only, but the output design.

Is this even possible? also is there any openso

Answer 1

If you are using KDE, you can use Kompare or KDiff3.

However, if you want to view how your web page looks in different browsers in different operating systems, BrowserShots can used.