Websites and online stores: Check accessibility - is my website online?

From time to time we receive emails from our customers with the following information: "My website is not available".
Sometimes this is the case and we remedy the situation as quickly as possible.

In most cases, however, the customer's website is accessible as normal. But probably not for the customer himself. If we now tell the customer that everything is fine and also send a screenshot, this usually does not satisfy the customer.

Check accessibility independently:

• https://downforeveryoneorjustme.com
  Simply enter your domain in the field, for example optprojects.com and then click on "or just me".
  You should now see the result: It's just you. optprojects.com is up. Up means "online" here
• http://www.isitdownrightnow.com
  Simply enter your domain in the field, for example optprojects.com and then click on "CHECK".
  You should now see the result: optprojects.com is UP and reachable. The website is probably down just for you... This roughly means: the website is online and accessible. The website is probably down just for you.

If you want to keep an eye on this in the future (the hoster can tell you a lot), you should set up a so-called Monitoring service use.
A good monitoring service monitors permanent Your website or online store is completely independent of your hoster and informs you by e-mail and/or SMS in the event of outages.
Your website can be checked every minute so that you can always keep an eye on outages.
A very good monitoring service here is definitely serverstate.de