Google Public DNS has rewritten the companion web app made available at
https://dns.google/ (and
https://dns.google.com/ -- but this name is deprecated). A new technology stack powers this app with a slightly updated look but it should have all the features you’re familiar with plus a few new ones, including the ability to show full DNSSEC detail along with your queries.
Some users have helped us find some minor issues, already fixed, with the first release of this version of the app. If you notice any further problems please let us know at our issue tracker:
https://issuetracker.google.com/issues/new?component=191657&template=847301 .