The Google-owned family of apps has crashed for thousands of users worldwide.
This includes Gmail, Google Drive, Google Sheets and YouTube as well as the main search engine.
Outage tracker site DownDetecter clocked tens of thousands of users reporting issues with the sites around 11:40am.
Problems were reported mainly in Europe but also in Australia, the east coast of the USA and parts of Africa, South America and Asia.
Google said it was ‘aware of the problem’ and that it had left the ‘majority’ of users unable to access its services.
Google’s websites are some of the most popular in the world, with its video-streaming site YouTube frequented by more than two billion people every month.
Gmail meanwhile is the world’s most popular email platform with other 1.5 billion users.
Unlike other tech firms like Facebook, outages are rare at Google, and there is no explanation for the outage.
By 11:54am GMT there was more than 50,000 complaints for YouTube alone. with half (49 per cent) regarding issues with the website and 43 per cent pertaining to problems watching videos.
Gmail had 23,000 complaints before midday and Google’s main site had a reported 19,000 complaints.
Eighty-one and 91 per cent of the issues with these sites, respectively, was to do with logging in, according to DownDetector.
MailOnline has approached Google for comment.
YouTube’s ‘TeamYouTube’ Twitter account said: ‘We are aware that many of you are having issues accessing YouTube right now – our team is aware and looking into it. We’ll update you here as soon as we have more news.’
Other affected sites includes Google Meet, Hangouts and the Play Store as well as the Pokemon Go game, which is made by Niantic, another Google-owned company.
It appears the outage is not uniform, with some users reporting a ‘400 error message’ while it is working fine for others.
However, a quick test at the London office of MailOnline reveals Sheets, Gmail and YouTube are offline with issues also hitting Maps.
Google’s online dashboard that tracks the status of all its services reveals the problem is ubiquitous across all Google services.