If there are problems, head to the FAQ

Results are now cached globally for up to 6 hours.

Enter a URL or a hostname to test the server for CVE-2014-0160.

This test has been discontinued in March 2019. You can use the open-source command line tool or the SSL Labs online test.

Go!

All good, seems fixed or unaffected!

Uh-oh, something went wrong:
Check what it means at the FAQ.
It might mean that the server is safe, we just can't be 100% sure! If you know what you are doing, tick the ignore certificates box. Otherwise please try again!

IS VULNERABLE.

Here is some data we pulled from the server memory:
(we put YELLOW SUBMARINE there, and it should not have come back)

Please take immediate action!

You can specify a port like this example.com:4433. 443 by default.

Go here for all your Heartbleed information needs.

If you want to donate something, I've put a couple of buttons here.