~/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 187 more days.
── output ─────
- Issued to
- asda.com
- Issued by
- GlobalSign RSA OV SSL CA 2018
- Valid from
- 2025-09-24
- Valid until
- 2026-10-26 (187 days)
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_256_GCM_SHA384
- Key
- RSA · 2048 bit
- Signature
- sha256WithRSAEncryption
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- 51:AC:57:CF:E9:F2:CA:F5:82:61:40:CF:E9:F5:CA:67:22:42:AE:4C:89:6D:C0:E7:4B:5C:5E:BA:77:C5:C2:72
- Serial
- 21DB81179C3C7CDDFFEE2A3D
subject_alt_names · 9
asda.com
commerce.asda.com
corporate.asda.com
ghs-mm.asda.com
groceries.asda.com
login.asda.com
support.asda.com
www.asda.com
www.corporate.asda.com
certificate_chain · 3 certs
[ leaf ]asda.com
187 days left
issuer: GlobalSign RSA OV SSL CA 2018
2025-09-24 → 2026-10-26
[ inter ]GlobalSign RSA OV SSL CA 2018
944 days left
issuer: GlobalSign
2018-11-21 → 2028-11-21
[ inter ]GlobalSign
646 days left
issuer: GlobalSign Root CA
2018-09-19 → 2028-01-28