Hey folks!
We're happy (and kinda proud) to announce that one of our Wikibase Quality Extensions was deployed yesterday -- with it, you will be able to perform live checks for most property constraints on both items and properties.

The special page will be accessible here: https://www.wikidata.org/wiki/Special:ConstraintReport
Some documentation can be found here: https://www.mediawiki.org/wiki/Wikibase_Quality_Extensions

We hope, you'll like it! (By the way, we found out that 97% of constraints are complying so go for the last 3%! :wink: )
Cheers,
the Wikidata Quality Team (Andreas Burmeister, Jonas Keutel, Sören Oldag, Dominic Sauer, Dimitri Schmidt and Tamara Slosarek)