~/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 200 more days.
── output ─────
- Issued to
- theguardian.com
- Issued by
- GlobalSign Atlas R3 DV TLS CA 2025 Q3
- Valid from
- 2025-10-07
- Valid until
- 2026-11-08 (200 days)
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_128_GCM_SHA256
- Key
- RSA · 2048 bit
- Signature
- sha256WithRSAEncryption
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- CE:76:B8:5C:EB:C2:5F:5F:2B:AF:02:EF:3D:95:77:42:86:D0:EC:3E:79:F4:00:4E:F9:46:F2:E9:90:D5:82:D2
- Serial
- 0179963CF3A0A3A2FE8393389D750048
subject_alt_names · 32
theguardian.com
*.code.dev-guardianapis.com
*.code.dev-theguardian.com
*.dev-theguardian.com
*.editorial.theguardian.com
*.email.theguardian.com
*.guardian.co.uk
*.guardianapis.com
*.guim.co.uk
*.guimcode.co.uk
*.ophan.co.uk
*.qa.dev-guardianapis.com
*.service.theguardian.com
*.theguardian.co.uk
*.theguardian.com
*.theguardian.design
api.nextgen.guardianapps.co.uk
code.api.nextgen.guardianapps.co.uk
dev-gutools.co.uk
dev-theguardian.com
guardian.co.uk
guim.co.uk
gutools.co.uk
i.guimcode.co.uk
media.guim.co.uk
subscribe.theguardian.com
theguardian.co.uk
theguardian.design
*.wordiply.com
wordiply.com
theguardianfoundation.org
theguardian.org
certificate_chain · 2 certs
[ leaf ]theguardian.com
200 days left
issuer: GlobalSign Atlas R3 DV TLS CA 2025 Q3
2025-10-07 → 2026-11-08
[ inter ]GlobalSign Atlas R3 DV TLS CA 2025 Q3
359 days left
issuer: GlobalSign
2025-04-16 → 2027-04-16