~/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 165 more days.
── output ─────
- Issued to
- www.santander.co.uk
- Issued by
- Sectigo Public Server Authentication CA OV R36
- Valid from
- 2025-10-03
- Valid until
- 2026-10-03 (165 days)
- TLS version
- TLSv1.2
- Cipher
- ECDHE-RSA-AES256-GCM-SHA384
- Key
- RSA · 2048 bit
- Signature
- sha256WithRSAEncryption
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- E6:E6:C2:1F:C0:95:61:24:A1:FD:9F:E3:A4:E5:2C:C3:3D:39:9C:7E:89:F7:4C:56:3E:9B:A2:15:14:04:AA:20
- Serial
- 303A34E74111D423E3AB1E5D4BC16CE3
subject_alt_names · 2
www.santander.co.uk
santander.co.uk
certificate_chain · 4 certs
[ leaf ]www.santander.co.uk
165 days left
issuer: Sectigo Public Server Authentication CA OV R36
2025-10-03 → 2026-10-03
[ inter ]Sectigo Public Server Authentication CA OV R36
3622 days left
issuer: Sectigo Public Server Authentication Root R46
2021-03-22 → 2036-03-21
[ inter ]Sectigo Public Server Authentication Root R46
4290 days left
issuer: USERTrust RSA Certification Authority
2021-03-22 → 2038-01-18
[ root ]USERTrust RSA Certification Authority
4290 days left
issuer: USERTrust RSA Certification Authority
2010-02-01 → 2038-01-18