SSL/TLS & Transport
critical Severity
Free Check

SSL Certificate Expiry Monitoring

Tracks certificate expiration dates and triggers alerts before certificates lapse, avoiding browser security warnings.

Test Your Website for SSL Certificate Expiry Monitoring

Run this check along with 90+ automated tests across your domain.

Why It Matters

An expired certificate causes immediate full-screen security warnings, destroying user trust and dropping web traffic.

How We Check This

We parse the peer certificate validity dates and calculate days remaining until expiration (warning below 30 days, critical below 14 days).

How to Fix & Implement

Copy-paste configuration blocks tailored for your web server or edge proxy.

nginx snippet
certbot renew --dry-run # Set up automated Let's Encrypt cron renewal

Frequently Asked Questions

How often should SSL certificates renew?

Modern certificates have a maximum validity of 398 days (and standard Let’s Encrypt renews every 60–90 days).