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SSL Labs Server Test vs Decoder.link SSL Checker: catalog facts
SSL Labs Server Test	Decoder.link SSL Checker
Free Free online service from Qualys.	Free Free to use in the browser.
Web	Web
Detailed coverage of protocols, ciphers and vulnerabilities Letter grade that is easy to compare	Checks any port, with SNI and STARTTLS support Many related certificate tools on the same site
Public servers only A full test takes a while to run	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.