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Support For Self-Signed SSL Certificates (And How HTTPS URLs Are Handled).

Written by Tomas Koprusak 107 words | 1 min read Updated Nov 13, 2025
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Since the beginning, Uptime Robot was supporting URLs with SSL certificates (https).

However, self-signed certificates (the ones with unknown CAs) were not supported as they were generating errors like “unknown certificate”, etc. and Uptime Robot was considering these websites to be down.

Today, URLs with self-signed certificates are now supported just like any other URL (as you already know the certificate is self-signed and no need to throw alerts).

On the other hand, for any type of https URLs, if the certificate is an invalid one (like the common name and URL not matching) or the date is expired, Uptime Robot will keep sending a down alert.

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Tomas Koprusak

Written by

Tomas Koprusak

Product Owner |

He has worked for Sygic as a marketer and co-led the implementation and development of a product acquired from a competitor. He has also worked as a freelance developer, helping clients from various areas. Tomas brings a wealth of industry experience to our team. He spent a few years in the blockchain industry, leading projects and marketing teams at multiple blockchain-based companies. He has presented products and managed deals in more than 10 countries around the world, managed the ICO, and built a successful marketing team at Fuergy that continues to thrive. Tomas managed a product team for the biggest job site in Slovakia, covering development and transformation to a new B2B app. Not only is Tomas skilled at web development, but he also has a deep understanding of SaaS businesses, which makes him an invaluable asset in shaping and leading various projects at UptimeRobot. His focus is always on the continual improvement of our service and user experience. In addition to his professional achievements, Tomas is a devoted father. His personal interests include cycling (he traveled around the whole country of Slovakia), playing guitar (he even played in a band), servicing bikes, music, and enjoying good beer.

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