SSL Certificate Check
See whether a site's SSL/TLS certificate is valid, who issued it, and exactly how many days remain before it expires.
PingStuff reads the certificate your server presents during the secure handshake and highlights its expiry date, so a soon-to-lapse certificate stands out before it causes warnings.
Enter your domain and PingStuff opens a secure connection, reads the SSL/TLS certificate your server presents, and checks the essentials: is it currently valid, does it match your domain name, and how many days until it expires? An expiring certificate is one of the most common causes of a site that "suddenly" scares visitors away overnight.
The expiry countdown matters because certificates lapse on a fixed date, whether or not anyone is watching. Most are meant to renew automatically, but a broken renewal is silent until the day it fails — so a check that surfaces the remaining days gives you time to act.
What to do next
- Note the days remaining. If renewal is automatic, confirm it runs comfortably ahead of expiry — a common setup renews roughly a month early.
- If the certificate is close to expiring or already invalid, renew or reissue it now; visitors see a full-page browser warning the moment it lapses.
- If the certificate is valid here but browsers still complain, the intermediate chain may be misconfigured — reinstall the full chain your certificate authority provides.
To see exactly what visitors experience when a certificate lapses, read how SSL expiry breaks a website overnight. To get an email reminder before it happens instead of hearing it from a customer — SMS alerts reach verified Canadian mobiles — turn on monitoring.
Frequently asked questions
What happens when an SSL certificate expires?
Browsers stop trusting the connection and show a full-screen security warning instead of your site. Most visitors leave immediately, and apps or integrations that require HTTPS can start failing too.
How far ahead of expiry should I renew?
Sooner than you think. Many automated setups renew about 30 days early to leave room for retries. If you renew manually, do it with at least a week to spare so a hiccup does not turn into downtime.
Why does my certificate look valid in one browser but not another?
Usually the intermediate certificate chain is incomplete. Some browsers cache the missing link from other sites and appear fine, while others do not and show an error. Reinstalling the full chain fixes it for everyone.
What is the difference between SSL and TLS?
TLS is the modern successor to SSL, but the padlock and certificates are still commonly called 'SSL' out of habit. PingStuff checks the certificate presented over today's TLS handshake either way.
Does PingStuff check the whole certificate chain?
It reads the certificate your server presents during the handshake and focuses on validity and expiry. For a deep chain-and-configuration audit, a dedicated certificate-authority tool complements this quick check.