~/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 67 more days.

── output ─────

Issued to: x.com
Issued by: E8
Valid from: 2026-03-30
Valid until: 2026-06-28 (67 days)
TLS version: TLSv1.3
Cipher: TLS_AES_256_GCM_SHA384
Key: EC (prime256v1) · 256 bit
Signature: ecdsa-with-SHA384
Forward secrecy: yes
Self-signed: no
Must-staple: no
SHA-256 fingerprint: 0A:05:F2:E1:BE:C8:C4:74:AE:B4:FF:2B:34:CA:5D:51:14:4F:92:45:E9:71:29:01:EF:24:E7:79:7E:42:C3:27
Serial: 056BC55267D7C6BC7199FE3124E88D44BF25

subject_alt_names · 3

*.x.com cdn.syndication.x.com x.com

certificate_chain · 2 certs

[ leaf ]x.com

67 days left

issuer: E8

2026-03-30 → 2026-06-28

[ inter ]E8

325 days left

issuer: ISRG Root X1

2024-03-13 → 2027-03-12

// Save x.com → we'll run this daily and alert on changes. /signup →