SSL Certificate Checker
Free online SSL/TLS analysis — no signup required
We automatically add https:// — just type your domain. We'll run the relevant scanners and email you the full report.
What We Check
Certificate Validity
Verifies the certificate is not expired and within its validity period.
Certificate Chain
Checks the full chain (leaf → intermediate → root) is presented correctly.
Cipher Strength
Identifies weak ciphers (RC4, 3DES, CBC, NULL, EXPORT) and recommends AEAD ciphers.
Protocol Version
Detects deprecated protocols (SSLv2, SSLv3, TLS 1.0/1.1) and recommends TLS 1.2+.
Key Strength
Verifies the certificate key length is at least 2048 bits for RSA or 256 bits for ECDSA.
Signature Algorithm
Flags certificates signed with deprecated SHA-1 algorithm.
Get a Complete Security Audit
This checker is just part of our 27-scanner security assessment. Run a full scan for a complete report.
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