SSL certificate expiry monitoring for your domains

Hello, sharing a tool I built: https://certavert.com

You add your domains (any port works) and it checks the certificates on a schedule. You get an email before they expire, and it also flags hostname mismatches, untrusted or self-signed certs, broken chains and old TLS versions.

You can do a quick tour here: https://certavert.com/tour

The free plan covers 3 domains. There are also free checkers you can use without signing up: certificate, SANs, chain, TLS and DNS.

Check it out and let me know what you think.