~/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 307 more days.

── output ─────

Issued to: *.mediamarkt.de
Issued by: GeoTrust TLS RSA CA G1
Valid from: 2026-02-23
Valid until: 2027-02-22 (307 days)
TLS version: TLSv1.3
Cipher: TLS_AES_256_GCM_SHA384
Key: RSA · 2048 bit
Signature: sha256WithRSAEncryption
Forward secrecy: yes
Self-signed: no
Must-staple: no
SHA-256 fingerprint: 66:27:B5:20:56:56:99:61:E5:C4:C6:95:0B:85:8C:66:B7:0A:B4:36:75:2A:01:47:26:1D:90:3A:7C:A8:A1:40
Serial: 0227EA544F33E7B57BE8023E1772065C

subject_alt_names · 2

*.mediamarkt.de mediamarkt.de

certificate_chain · 3 certs

[ leaf ]*.mediamarkt.de

307 days left

issuer: GeoTrust TLS RSA CA G1

2026-02-23 → 2027-02-22

[ inter ]GeoTrust TLS RSA CA G1

559 days left

issuer: DigiCert Global Root G2

2017-11-02 → 2027-11-02

[ inter ]DigiCert Global Root G2

2028 days left

issuer: DigiCert Global Root CA

2024-01-18 → 2031-11-09

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