Check SSL status across many domains at once. Free bulk SSL certificate checker.
The Multi-domain SSL Checker runs SSL certificate checks against many hostnames in one go. You provide a list of domains (or URLs), and the tool checks each for certificate validity, expiry, chain completeness, and optionally protocol and cipher configuration. Results are usually summarized in a table or export so you can see which domains are OK, which are expiring soon, and which have errors. Use it for monitoring a large number of sites (e.g. agency or enterprise), for post-migration verification, or for building an inventory of certificate expiry dates. The tool may rate-limit or batch requests to avoid overloading CAs or your infrastructure. For a single domain, a regular SSL certificate checker is sufficient; this one is for scale.
Depends on the tool; often tens to hundreds per run. Very large lists may need batching or an API.
Many bulk checkers accept a list (one domain per line) via paste or file upload.
Typically validity, expiry, chain, and hostname match. Some also check TLS version, ciphers, or OCSP.
Often yes: CSV or similar for use in spreadsheets or monitoring. Check the tool's export options.
Each check is a TLS connection to the domain. The load is similar to one visitor per domain per run; spread over time it's usually minimal.