How This Certificate Checker Works
Our SSL checker performs:
Direct TLS handshake with your domain
Reads certificate metadata, such as issuer, SANS, key type
Validates the certificate chain up to the root CA
Checks expiration date & days remaining
Performs lightweight security checks, such as weak algorithms
Displays a simplified health report
Supported Protocols
HTTPS
TLS 1.3
TLS 1.2
IMAPS
POP3S
SMTP STARTTLS
IPv4
IPv6
Automated Monitoring
Stop Manually Checking Certificates. The free checker shows today's status - but certificates can change at any time. CertificateManager.net provides automated, ongoing monitoring with:
- Real-time expiry alerts (Email, Slack, Teams, Webhook)
- Auto-discovery of all certificates across cloud & infrastructure
- Automated renewals/Service disruption
- Unified dashboard for all your certs
- Compliance & security reporting
Alerts
Dashboard
Secure
Why Certificate Expiration Matters
Expired or misconfigured certificates cause
Website downtime
Browser security warnings
Broken APIs
Failed mobile app connections
Lost customer trust
Internal outages and alert storms
Major incident escalations
Even large companies (Microsoft, Shopify, LinkedIn, Azure) have suffered outages caused by expired certificates.
Benefits of Ongoing Monitoring
Turn One-Time Checks into Continuous Protection
Most teams only check certificates when an issue occurs. This often leads to:
Common Issues
- Missed renewals
- Sudden outages
- Service disruption
- Emergency fixes
- Compliance failures
Auto-track
Automatically track all certificates
Easy-Alerts
Get notified well before expiration
No Suprises
Never be surprised by an outage again
Save Time
Eliminate manual checks
FAQ - Certificate Expiration Checkerr
This tool focuses on expiration, chain health, and quick diagnostics - ideal for DevOps, IT, and security teams.
We only perform a standard TLS handshake - the same as a normal browser.
Only if you enable optional tracking or monitoring. Otherwise checks are anonymous.
Yes - you can track all your certificates from one dashboard in CertificateManager.net.
Keep Your Certificates Healthy - Automatically
This free tool gives you a snapshot of your certificate status.
We accept payments via
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