~/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 245 more days.
── output ─────
- Issued to
- cname-hmrc-gov-uk.production.tax.service.gov.uk
- Issued by
- Amazon RSA 2048 M01
- Valid from
- 2025-11-23
- Valid until
- 2026-12-22 (245 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
- C9:C0:B2:38:47:0A:5C:30:3C:E6:2E:62:7E:3D:0A:DB:BD:F4:2A:EA:83:2A:49:BE:BF:0A:B6:64:9F:CE:5C:A7
- Serial
- 04929A3217323E920648A68BCF7EF05D
subject_alt_names · 8
cname-hmrc-gov-uk.production.tax.service.gov.uk
hmrc-gov-uk.vpn.production.tax.service.gov.uk
hmrc.gov.uk
hmrc-gov-uk.isc.production.tax.service.gov.uk
redirect.hmrc.gov.uk
www.hmrc.gov.uk
www.inlandrevenue.gov.uk
hmrc-gov-uk.production.tax.service.gov.uk
certificate_chain · 3 certs
[ leaf ]cname-hmrc-gov-uk.production.tax.service.gov.uk
245 days left
issuer: Amazon RSA 2048 M01
2025-11-23 → 2026-12-22
[ inter ]Amazon RSA 2048 M01
1585 days left
issuer: Amazon Root CA 1
2022-08-23 → 2030-08-23
[ inter ]Amazon Root CA 1
4271 days left
issuer: Starfield Services Root Certificate Authority - G2
2015-05-25 → 2037-12-31