~/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 259 more days.

── output ─────

Issued to: dkb.de
Issued by: DKB CA 1O1
Valid from: 2025-12-10
Valid until: 2027-01-05 (259 days)
TLS version: TLSv1.3
Cipher: TLS_AES_128_GCM_SHA256
Key: RSA · 2048 bit
Signature: sha256WithRSAEncryption
Forward secrecy: yes
Self-signed: no
Must-staple: no
SHA-256 fingerprint: D8:D6:0F:D0:59:AC:64:A5:84:01:A1:B1:61:CA:8E:0E:D7:C5:7F:52:4D:7F:1D:8D:88:7F:A2:85:51:21:3C:03
Serial: 0DB4D4630A448EACF0782DD770076B4B

subject_alt_names · 1

dkb.de

certificate_chain · 2 certs

[ leaf ]dkb.de

259 days left

issuer: DKB CA 1O1

2025-12-10 → 2027-01-05

[ inter ]DKB CA 1O1

1803 days left

issuer: DigiCert Trusted Root G4

2021-03-30 → 2031-03-29

// Save dkb.de → we'll run this daily and alert on changes. /signup →