SSL & Domain Expiry Checker
Check SSL certificate and domain expiry dates. Free, no signup.
An expired SSL certificate or a lapsed domain is one of the fastest ways to take a healthy site offline — and one of the easiest to prevent. This checker reads a host’s live certificate to show the SSL expiry date, the issuing authority, and the domain registration expiry, so you can renew on time and avoid the dreaded browser security warning.
Seeing a certificate warning in the browser? Look it up in our list of common SSL errors and their fixes, or read the guide on why SSL and domain expiry matters.
How it works
- 01
Enter a hostname
Type the domain you want to inspect — no protocol or path needed, just the host.
- 02
Run the check
Sitewell opens a TLS connection and reads the live certificate plus domain registration details.
- 03
Review expiry
See days remaining on the SSL certificate, the issuing authority, and when the domain registration expires.
Frequently asked questions
- What happens when an SSL certificate expires?
- Once a certificate expires, browsers show a full-page security warning and block access until visitors click through, killing trust and traffic. Renew well before the expiry date — most teams set a reminder or monitor at least two weeks out.
- What is the difference between SSL expiry and domain expiry?
- SSL expiry is when the TLS certificate that encrypts traffic stops being valid. Domain expiry is when your registration of the domain name lapses. Both can take a site offline, but they renew through different providers, so check and track them separately.
- How often should I check my SSL certificate?
- Manually checking before each renewal is the minimum. Because certificates are easy to forget, the safer approach is continuous monitoring that alerts you a set number of days before expiry — Sitewell can watch a host and notify you automatically.
- Who issued my certificate, and does it matter?
- The issuer is the Certificate Authority that signed your certificate (for example Let's Encrypt, DigiCert, or Google Trust Services). It rarely affects visitors, but a sudden change in issuer can signal a misconfiguration or an unexpected reissue worth investigating.