~/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 42 more days.

── output ─────

Issued to: heroku.com
Issued by: E7
Valid from: 2026-03-05
Valid until: 2026-06-03 (42 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: 48:BC:BB:09:8E:EF:93:26:B8:C1:AF:4B:A5:35:F9:F2:98:4E:E0:AC:64:CC:7D:9B:70:94:05:22:E6:0B:E2:D9
Serial: 0568343E1559B14D9682D1F6F950D97EC64F

subject_alt_names · 2

heroku.com www.heroku.com

certificate_chain · 2 certs

[ leaf ]heroku.com

42 days left

issuer: E7

2026-03-05 → 2026-06-03

[ inter ]E7

325 days left

issuer: ISRG Root X1

2024-03-13 → 2027-03-12

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