~/tools / ssl-checker

SSL Checker

Check SSL certificate expiry, chain validity, TLS version and cipher. Catches expired certs, weak crypto and chain issues.

>
[ OK ] Valid for 73 more days.
── output ─────
Issued to
cnn.com
Issued by
GlobalSign ECC OV SSL CA 2018
Valid from
2025-06-02
Valid until
2026-07-04 (73 days)
TLS version
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256
Key
EC (prime256v1) · 256 bit
Signature
ecdsa-with-SHA384
Forward secrecy
yes
Self-signed
no
Must-staple
no
SHA-256 fingerprint
AE:F9:14:4C:2C:95:E8:1F:36:43:C7:A5:06:4C:EC:85:E4:A8:85:DA:A9:9F:CC:50:92:BA:92:DC:53:BF:95:E4
Serial
55F4B026CEDC0FE61EBB6AB0
subject_alt_names · 2
cnn.com *.cnn.com
certificate_chain · 2 certs
[ leaf ]cnn.com
73 days left
issuer: GlobalSign ECC OV SSL CA 2018
2025-06-02 → 2026-07-04
[ inter ]GlobalSign ECC OV SSL CA 2018
944 days left
issuer: GlobalSign
2018-11-21 → 2028-11-21
// Save cnn.com → we'll run this daily and alert on changes. /signup →