You can go to the compare page like this one:
https://bitbucket.org/atlassian/atlaskit-mk-2/branches/compare
You can find the link to this in the "kebab" menu (the three dots) on the repository main page. It's the option that says "Compare branches or tags"
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.