A large amount of users across the world experienced difficulties connecting to WhatsApp on both iOS and Android.
According to website DownDetector, most of the problems were caused by connection issues followed by sending messages and logging into the service.
The cause of the crash is currently unknown.
According to WhatsApp figures released in September, more than 900 million people were on the service.
If you are wondering whether WhatsApp is down or you are facing issues connecting to your favourite messaging service, you are not alone.
The Facebook-owned service has acknowledged the issue.
“Some people have had trouble accessing WhatsApp for a short period today. We’re working to restore service back to 100% for everyone and we apologise for the inconvenience,” a WhatsApp spokesperson told Gadgets 360 in a statement.
The combination of cross-platform availability and avoiding SMS fees has made it a rising star around the world, but that reliance causes issues whenever WhatsApp suffers downtime.