Batch SSL Certificate Checker

Check SSL certificates for multiple domains at once

Checking certificates for all domains...

This may take a few seconds per domain

Total Domains

Valid

Errors

Expiring Soon

Domain	Status	Expires	Issuer	Days Left
	Valid Error Expired

Error

About Batch SSL Certificate Checker

Our free Batch SSL Certificate Checker lets you verify SSL certificates for multiple domains simultaneously. Enter one domain per line and get instant results showing validity, expiry dates, issuers, and days remaining. Perfect for managing multiple websites and ensuring no certificate goes unnoticed.

How to Use

1Enter one domain per line in the text area
2Click "Check All" to verify certificates for all domains
3Review results showing validity, expiry, issuer, and days remaining

Use Cases

•Monitor SSL certificates across all your domains
•Prevent downtime by catching expiring certificates early
•Audit certificate consistency across your infrastructure

Frequently Asked Questions

There is no strict limit, but for optimal performance we recommend checking up to 50 domains per batch. Each domain takes a few seconds to scan, so larger batches may take longer to complete.

The batch checker displays the SSL status (valid, expired, or error), expiry date, issuer name, and days remaining for each domain. Results are color-coded for quick visual scanning.

Results are displayed on screen in a table format. You can copy the data or use the Bulk Download tool to fetch the actual certificates for domains that passed validation.

Because verification is on here. This page connects with full certificate validation, so an expired, self-signed or unknown-authority certificate fails the connection and is recorded as an error. Tools that merely retrieve a certificate skip validation and will happily report those same certificates as present. Both behaviours are correct for their purpose — use this one when you need a verdict.

Expired means the connection was verified successfully and then the dates were read: the certificate is genuine and out of time. Errored means the connection could not be verified at all — an unknown authority, a name mismatch, a broken chain, or a network problem. The first is a scheduled task; the second needs diagnosis, and treating them alike is how a name-mismatch problem gets mistaken for a renewal that never happened.

Because no public trust store contains your private roots. The same certificate works fine on a machine where the corporate CA is installed, which is why these look like failures from outside the network. For internal estates, either exclude them from this check and use a tool that trusts your root, or accept the errors as expected and read them as a reminder of where the trust boundary sits.

There is no artificial cap in the code, but each domain consumes a connection and a timeout, and the rate limiter applies to the page. Realistically, batches of tens are comfortable and hundreds are slow enough to risk timeouts that would look like failures. For large estates, splitting into chunks and running them separately gives cleaner results than one oversized batch.

Yes — that pairing is the most valuable use. Before renewal you see the current state including any that are already failing; after deployment you see whether the change actually reached every host. Because the same verification runs both times, the comparison is like for like, and any domain that has not changed is one where the deploy hook missed.

How the Batch Runs

Enter a list of domains and this page checks them all, verifying each connection fully and summarising what it found. Connections are issued concurrently, so a hundred domains take roughly the time of the slowest handful rather than the sum of all of them.

1Check each domain with full verification enabled. That distinction matters from this page: the connection is validated against the system trust store, so a certificate that fails — expired, self-signed, unknown authority — is reported as an error rather than silently retrieved. Other download-style pages on this site deliberately skip verification and so never report those failures.
2Classify each outcome. Verified and unexpired is valid; unexpired but inside 30 days is counted as expiring soon; a verification failure, DNS failure, refused connection or timeout each get their own named error so the cause is visible per domain.
3Summarise the batch with totals for valid, expired, expiring-soon and errored, plus the specific domains expiring within 30 days. Work the summary top down: expired first, then verification errors, then the soon-to-expire list.

Each row also carries subject, issuer, expiry and serial, so a verified batch doubles as an inventory snapshot. Because verification is on, internal certificates with private roots will be reported as errors here — correct, since no public trust store accepts them.

Tips & Best Practices

•Use batch checking to efficiently monitor multiple domains
•Schedule regular batch scans for continuous monitoring
•Export batch results for reporting and documentation
•Set up batch scan alerts for certificate issues

Technical Details

Capacity: Check up to 100 domains per batch operation
Parallel: Concurrent certificate checking for fast results
Output: Batch summary report with per-domain details
Export: CSV and JSON export for batch results