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DigiCert SSL Installation Checker vs Decoder.link SSL Checker: catalog facts
DigiCert SSL Installation Checker	Decoder.link SSL Checker
Free Free to use; DigiCert sells certificates.	Free Free to use in the browser.
Web	Web
Diagnoses installation and chain problems Related CSR and S/MIME tools on the same site	Checks any port, with SNI and STARTTLS support Many related certificate tools on the same site
Focused on installation rather than a full protocol audit Surrounded by a certificate vendor's sales pages	Focused on certificate installation rather than a full cipher audit Tied to a certificate seller's site
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.