The Google-owned family of apps have crashed for thousands of users worldwide.
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.
Unlike other tech firms like Facebook, outages are rare at Google, DailyMail reports.
By 11:54am, 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.
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.