56Fair

duolingo.com

scanned 4/9/2026 in 1.6s

SSL

Headers

✓

Valid certificate from Amazon

Expires: 12/24/2026 (259 days)

✓

Protocol: TLSv1.2

Key: 2048 bits

SANs: duolingo.com

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!No HSTS header — browsers won't enforce HTTPS
!Security headers grade F — most headers missing

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