Validator.nu is tracked by us since April, 2011. Over the time it has been ranked as high as 24 399 in the world, while most of its traffic comes from USA, where it reached as high as 83 565 position. Html5.validator.nu receives about 58.87% of its total traffic. It was owned by several entities, from Henri Sivonen () to (not shown), it was hosted by RIPE Network Coordination Centre and GANDI DEDICATED-HOSTING LU1. While .NU Domain Ltd was its first registrar, now it is moved to Gandi SAS.

Html5.validator has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that Html5.validator.nu is poorly ‘socialized’ in respect to any social network. According to MyWot and Google safe browsing analytics, Html5.validator.nu is a fully trustworthy domain with no visitor reviews.