host.tools

SSL certificate inspector

SSL/TLS /api/v1/ssl/cert

Issuer, SAN, validity, fingerprints, full chain — for any TLS endpoint.

Try: host.com checkhost.com cloudflare.com github.com
Related: HTTP headers Security headers grader Redirect chain tracer SSL certificate inspector robots.txt parser sitemap.xml inspector

cloudflare-dns.com

issued by C=US, ST=Texas, L=Houston, O=SSL Corp, CN=SSL.com SSL Intermediate CA ECC R2
valid 226 days left
Subject
C=US, ST=California, L=San Francisco, O=Cloudflare, Inc., CN=cloudflare-dns.com
Valid from
2025-12-31T19:20:01+00:00
Valid to
2026-12-21T19:20:01+00:00
Handshake
545 ms
Subject Alternative Names (11)
cloudflare-dns.com *.cloudflare-dns.com 1.0.0.1 1.1.1.1 162.159.36.1 162.159.46.1 2606:4700:4700:0:0:0:0:1001 2606:4700:4700:0:0:0:0:1111 2606:4700:4700:0:0:0:0:64 2606:4700:4700:0:0:0:0:6400 one.one.one.one
Certificate chain (2)
  1. #0
    cloudflare-dns.com
    issuer: C=US, ST=Texas, L=Houston, O=SSL Corp, CN=SSL.com SSL Intermediate CA ECC R2
  2. #1
    SSL.com SSL Intermediate CA ECC R2
    issuer: C=US, ST=Texas, L=Houston, O=SSL Corporation, CN=SSL.com Root Certification Authority ECC
Fingerprints
SHA-1
F8:86:35:01:72:60:D4:0B:9E:B4:17:BE:E7:37:37:91:1B:63:0E:59:
SHA-256
E3:B0:28:26:78:9D:65:3D:22:4D:3E:DA:CB:E4:E8:77:CB:72:86:FC:4C:92:26:72:F6:22:67:41:CA:57:AD:65:
How to use SSL certificate inspector
  1. 1
    Paste your input

    Enter the value at the top — domain, IP, URL, email, ASN, hash, whatever fits this tool. The smart input auto-detects type.

  2. 2
    Click "Inspect"

    host.tools issues real probes (DNS, HTTP, TCP, TLS, WHOIS where applicable) and renders the result in milliseconds.

  3. 3
    Open the API tab

    Every web tool has a sibling /api/v1/ssl/cert JSON endpoint with the same payload. One copy-as-curl click and you're scripting it.

Why this matters

TLS misconfigurations cause silent failure: cert chains break, ciphers drift, HSTS times out. A 30-second cert audit beats a 3 AM page every single time.

API equivalent
/api/v1/ssl/cert?q=https%3A%2F%2Finfo.bancopatagonia.com.ar 
curl -s '/api/v1/ssl/cert?q=https%3A%2F%2Finfo.bancopatagonia.com.ar'
Embed this tool
<iframe src="/ssl/cert?q={INPUT}&embed=1"
  width="100%" height="600" frameborder="0"></iframe>

Drop into any HTML page. The embed=1 flag hides nav and footer.

FAQ · SSL certificate inspector

Common questions

Is SSL certificate inspector free?
Yes — every tool is free on the web with a 200/hour rate limit per IP. The matching API endpoint /api/v1/ssl/cert is free up to 100 requests/hour, no key required.
Where does the data come from?
Real-time probes against authoritative sources (DNS root, RIRs, registries, the target server itself), plus partner data feeds from hostinfo.com (GeoIP/ASN) and hostcheck.com (reputation).
How fresh are the results?
Live by default. Cached for 5 minutes to make repeat queries instant; pass ?nocache=1 for a forced refresh.
Can I run this from the command line?
Yes — every tool ships with a copy-as-curl. There's also an official CLI: host.tools ssl cert YOUR_INPUT.
Can I monitor results over time?
Pro tier lets you schedule any tool to run every 1/5/15/60 min and alert on diff. See monitors.
host.tools Pro

Run SSL certificate inspector on a schedule. Get pinged when it changes.

Pro gets you bulk lookups, monitors, webhook alerts, history, exports and 10,000 API calls/day. $19/mo.

See pricing Tour monitors
  • ✓Schedule any tool — every 1, 5, 15, 60 min
  • ✓Diff against last run, alert on change
  • ✓Webhook + email + Slack + PagerDuty + OpsGenie
  • ✓Bulk CSV upload, 1,000 inputs per job
  • ✓Export results as CSV / NDJSON / Excel
  • ✓90-day history, comparison view