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DigiCert SSL Installation Checker vs SSL Shopper SSL Checker: catalog facts
DigiCert SSL Installation Checker	SSL Shopper SSL Checker
Free Free to use; DigiCert sells certificates.	Free Free to use; the site also sells certificates.
Web	Web
Diagnoses installation and chain problems Related CSR and S/MIME tools on the same site	Quick check of chain, hostname match and expiry Optional expiry reminders
Focused on installation rather than a full protocol audit Surrounded by a certificate vendor's sales pages	Public hostnames only Results may be cached for up to a day
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.