~/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