~/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 87 more days.
── output ─────
- Issued to
- linear.app
- Issued by
- E7
- Valid from
- 2026-04-19
- Valid until
- 2026-07-18 (87 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
- 71:E2:DD:75:3E:DE:AC:74:34:BC:3B:48:4D:A9:B9:91:CB:33:8E:72:7B:4F:CB:41:9E:4D:E5:E6:9E:68:7B:66
- Serial
- 065A405E66190CD40E1E3D06384DD931C165
subject_alt_names · 2
*.client-preview.linear.app
linear.app
certificate_chain · 2 certs
[ leaf ]linear.app
87 days left
issuer: E7
2026-04-19 → 2026-07-18
[ inter ]E7
325 days left
issuer: ISRG Root X1
2024-03-13 → 2027-03-12