~/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 43 more days.
── output ─────
Issued to
fly.io
Issued by
E7
Valid from
2026-03-06
Valid until
2026-06-04 (43 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
A8:D4:2E:81:E3:E4:06:54:07:34:D6:8E:9F:26:9B:45:93:E6:23:6E:8D:CD:20:99:7C:61:0B:2A:87:90:DF:43
Serial
052386ADE190A4F663B25C3C21DB6622EBE1
subject_alt_names · 1
fly.io
certificate_chain · 2 certs
[ leaf ]fly.io
43 days left
issuer: E7
2026-03-06 → 2026-06-04
[ inter ]E7
325 days left
issuer: ISRG Root X1
2024-03-13 → 2027-03-12
// Save fly.io → we'll run this daily and alert on changes. /signup →