~/tools / ssl-checker

SSL Checker

Check SSL certificate expiry, chain validity, TLS version and cipher. Catches expired certs, weak crypto and chain issues.

[ WARNING ] Expires in 27 days. Schedule renewal.

── output ─────

Issued to: *.ft.com
Issued by: Certainly Intermediate R1
Valid from: 2026-04-19
Valid until: 2026-05-19 (27 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: 31:47:FE:26:2E:DF:2D:88:82:49:C5:A2:AA:40:9F:9C:D0:DE:9A:83:BD:6D:CF:E0:12:C7:85:F6:91:97:71:7A
Serial: 783A71D61A42C29A0E0B41DC4AD994A490C4

subject_alt_names · 2

*.ft.com ft.com

certificate_chain · 2 certs

[ leaf ]*.ft.com

27 days left

issuer: Certainly Intermediate R1

2026-04-19 → 2026-05-19

[ inter ]Certainly Intermediate R1

2253 days left

issuer: Starfield Root Certificate Authority - G2

2022-06-22 → 2032-06-21

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