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