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Welcome
OnlineOrNot is an website monitoring service. In particular, it provides uptime monitoring, checking whether your site is online, or not (hence the name).
It allows you to continuously monitor any website or API server. It notifies you instantly in the case of any problems - whether that's a timeout, 4xx error, or 5xx error.
If you have any questions at all - feel free to email me at max@onlineornot.com.
Get Started
Learn by doing: Create your account/Sign in, and add the websites and APIs you want to test!
If you prefer a guided approach, start with Register for an account.