Monitor SSL Certificates for Up to 100 Domains at Once
Monitor SSL health for multiple domains at once. Check expiration dates, issuer status, and validity for up to 100 domains in seconds.
📖 Learn more: Bulk SSL checking: monitoring 100+ domains
Why Use Bulk SSL Checker?
If you manage multiple websites or domains, checking each SSL certificate individually is time-consuming. Our bulk checker allows you to monitor all your certificates at once.
Benefits:
- Save time checking multiple certificates
- Get comprehensive overview of all certificates
- Identify expiring certificates across infrastructure
- Export results for reporting
How to Check SSL Certificates in Bulk
- Enter one domain per line in the box above, or upload a
.txtfile with one domain per line. You can check up to 100 domains per run. - Click Check Domains. Domains are checked in parallel batches, so most lists finish in under a minute.
- Scan the days-left column to spot certificates that expire soonest.
- Download the results as CSV or JSON to share with your team or track renewals in a spreadsheet.
Enter bare hostnames such as example.com or shop.example.com. Subdomains have separate certificates more often than you might expect, so list each one you serve traffic on.
Reading Your Bulk SSL Results
Days Left
The number of days until each certificate expires. Anything under 30 days needs attention now. With maximum certificate lifetimes now at 200 days and falling to 47 days by 2029, a certificate that is not renewing automatically will show up here quickly.
Issuer
Which Certificate Authority issued each certificate. An unexpected issuer can reveal a forgotten CDN, a hosting provider's default certificate, or a team buying certificates outside your normal process.
Valid From and Valid To
The exact validity window of each certificate. Domains that could not be reached show an error instead, so you can investigate DNS or connectivity problems separately.
When to Use a Bulk SSL Check
- Monthly renewal reviews across every domain and subdomain you own.
- After a migration to a new host, CDN or load balancer, to confirm every hostname still serves a valid certificate.
- Agency and MSP audits of client portfolios before contracts renew.
- Incident response, when a CA revokes certificates and you need to know which of your sites are affected.
Frequently Asked Questions
How many domains can I check at once?
You can check up to 100 domains in a single run. For larger portfolios, split your list into batches of 100.
Can I export the bulk SSL results?
Yes. You can download the results as a CSV file for spreadsheets or as JSON for scripts and monitoring tools.
Can I upload a file of domains?
Yes. Upload a plain .txt file with one domain per line, or paste the list directly into the text box.
Why does a domain show an error instead of certificate details?
The server could not be reached on port 443, the hostname does not resolve, or the connection timed out. Check the domain in the SSL Checker and its records in DNS Lookup to find the cause.
How often should I run a bulk SSL check?
At least monthly, and after any infrastructure change. Our guide to renewing SSL certificates before they expire explains how to set up reminders and automation.