~/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 86 more days.
── output ─────
- Issued to
- notion.so
- Issued by
- WE1
- Valid from
- 2026-04-17
- Valid until
- 2026-07-16 (86 days)
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_256_GCM_SHA384
- Key
- EC (prime256v1) · 256 bit
- Signature
- ecdsa-with-SHA256
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- 7E:1D:2E:1E:F5:0D:6B:AF:22:CC:79:06:B1:DF:29:F3:45:18:3F:EF:F4:61:42:7E:5B:6E:DD:16:54:CE:86:2C
- Serial
- 3F875AC72797408213AC58DFD9418330
subject_alt_names · 5
notion.so
*.notion.so
*.dev.notion.so
*.stg.notion.so
*.www.notion.so
certificate_chain · 3 certs
[ leaf ]notion.so
86 days left
issuer: WE1
2026-04-17 → 2026-07-16
[ inter ]WE1
1035 days left
issuer: GTS Root R4
2023-12-13 → 2029-02-20
[ inter ]GTS Root R4
646 days left
issuer: GlobalSign Root CA
2023-11-15 → 2028-01-28