are there any tools to visually compare two different web pages? [closed]

Question

I'm looking for a tool that will visually compare two rendered web pages and highlight the differences. the idea is to catch rendering changes across the site.

i swear i've seen such a thing before but i can't find anything.

Answer 1

So far I’ve found the following tools that I want to try out – probably starting with Wraith:

• Diffee
• Dpxdt
• Happo
• Wraith

There are also online services such as Percy and Instadiff.

Answer 2

take a look at BBC's wraith - https://github.com/BBC-News/wraith