~/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 36 more days.

── output ─────

Issued to: rewe.de
Issued by: R13
Valid from: 2026-02-27
Valid until: 2026-05-28 (36 days)
TLS version: TLSv1.3
Cipher: TLS_AES_256_GCM_SHA384
Key: RSA · 3072 bit
Signature: sha256WithRSAEncryption
Forward secrecy: yes
Self-signed: no
Must-staple: no
SHA-256 fingerprint: FA:3F:93:0C:D3:16:B7:F5:FA:4B:B4:A1:A9:22:89:A9:F3:68:3E:9D:55:B1:37:0F:8F:FA:D5:E6:5B:40:F7:F7
Serial: 059C91090F8E4C46CCA182F0DB5B399E4F18

subject_alt_names · 1

rewe.de

certificate_chain · 2 certs

[ leaf ]rewe.de

36 days left

issuer: R13

2026-02-27 → 2026-05-28

[ inter ]R13

325 days left

issuer: ISRG Root X1

2024-03-13 → 2027-03-12

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