Try Oh Dear without an account

You can test all of the checks we perform as a one-off scan. See the results immediately for any website you want.

Website availability check

Let us check the availability of your website from endpoints all around the world.

Want to test your website from Sydney, Paris, Bangalore, Dallas, Frankfurt or more locations? Give it a try.

Test website uptime »

Certificate health check

We can quickly scan your domain and verify if your SSL/TLS certificates are good: the expiration date, the chain of trust, trusted root anchors, SHA1 hashes, ...

Scan your domain »