~/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 317 more days.
── output ─────
Issued to
www.sainsburys.co.uk
Issued by
Sectigo Public Server Authentication CA EV R36
Valid from
2026-03-04
Valid until
2027-03-04 (317 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
0D:6C:9A:A5:3C:DB:C6:21:0A:25:5C:85:A7:FD:9F:9C:C3:9F:62:17:50:7C:FA:C3:D8:4C:1E:56:7C:CF:B2:6B
Serial
AB4E94511FE2DAD76C0FE3302964EB98
subject_alt_names · 4
www.sainsburys.co.uk recipes.sainsburys.co.uk sainsburys.co.uk www.sainsburys.com
certificate_chain · 3 certs
[ leaf ]www.sainsburys.co.uk
317 days left
issuer: Sectigo Public Server Authentication CA EV R36
2026-03-04 → 2027-03-04
[ inter ]Sectigo Public Server Authentication CA EV 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
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