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

*.google.com

issued by C=US, O=Google Trust Services, CN=WR2
valid 64 days left
Subject
CN=*.google.com
Valid from
2026-04-20T08:35:05+00:00
Valid to
2026-07-13T08:35:04+00:00
Handshake
17 ms
Subject Alternative Names (137)
*.google.com *.appengine.google.com *.bdn.dev *.origin-test.bdn.dev *.cloud.google.com *.crowdsource.google.com *.datacompute.google.com *.google.ca *.google.cl *.google.co.in *.google.co.jp *.google.co.uk *.google.com.ar *.google.com.au *.google.com.br *.google.com.co *.google.com.mx *.google.com.tr *.google.com.vn *.google.de *.google.es *.google.fr *.google.hu *.google.it *.google.nl *.google.pl *.google.pt *.googleapis.cn *.gstatic.cn *.gstatic-cn.com googlecnapps.cn *.googlecnapps.cn googleapps-cn.com *.googleapps-cn.com gkecnapps.cn *.gkecnapps.cn googledownloads.cn *.googledownloads.cn recaptcha.net.cn *.recaptcha.net.cn recaptcha-cn.net *.recaptcha-cn.net widevine.cn *.widevine.cn ampproject.org.cn *.ampproject.org.cn ampproject.net.cn *.ampproject.net.cn google-analytics-cn.com *.google-analytics-cn.com googleadservices-cn.com *.googleadservices-cn.com googlevads-cn.com *.googlevads-cn.com googleapis-cn.com *.googleapis-cn.com googleoptimize-cn.com *.googleoptimize-cn.com doubleclick-cn.net *.doubleclick-cn.net *.fls.doubleclick-cn.net *.g.doubleclick-cn.net doubleclick.cn *.doubleclick.cn *.fls.doubleclick.cn *.g.doubleclick.cn dartsearch-cn.net *.dartsearch-cn.net googletraveladservices-cn.com *.googletraveladservices-cn.com googletagservices-cn.com *.googletagservices-cn.com googletagmanager-cn.com *.googletagmanager-cn.com googlesyndication-cn.com *.googlesyndication-cn.com *.safeframe.googlesyndication-cn.com app-measurement-cn.com *.app-measurement-cn.com gvt1-cn.com *.gvt1-cn.com gvt2-cn.com *.gvt2-cn.com 2mdn-cn.net *.2mdn-cn.net googleflights-cn.net *.googleflights-cn.net admob-cn.com *.admob-cn.com *.gemini.cloud.google.com googlesandbox-cn.com *.googlesandbox-cn.com *.safenup.googlesandbox-cn.com *.gstatic.com *.metric.gstatic.com *.gvt1.com *.gcpcdn.gvt1.com *.gvt2.com *.gcp.gvt2.com *.url.google.com *.youtube-nocookie.com *.ytimg.com ai.android android.com *.android.com *.flash.android.com g.cn *.g.cn g.co *.g.co goo.gl www.goo.gl google-analytics.com *.google-analytics.com google.com googlecommerce.com *.googlecommerce.com ggpht.cn *.ggpht.cn urchin.com *.urchin.com youtu.be youtube.com *.youtube.com music.youtube.com *.music.youtube.com youtubeeducation.com *.youtubeeducation.com youtubekids.com *.youtubekids.com yt.be *.yt.be android.clients.google.com *.android.google.cn *.chrome.google.cn *.developers.google.cn *.aistudio.google.com
Certificate chain (3)
  1. #0
    *.google.com
    issuer: C=US, O=Google Trust Services, CN=WR2
  2. #1
    WR2
    issuer: C=US, O=Google Trust Services LLC, CN=GTS Root R1
  3. #2
    GTS Root R1
    issuer: C=BE, O=GlobalSign nv-sa, OU=Root CA, CN=GlobalSign Root CA
Fingerprints
SHA-1
30:DD:C1:AE:17:67:59:0A:2A:9C:1D:E3:B9:38:B2:60:4A:10:C7:AE:
SHA-256
BD:51:17:8F:71:1E:94:3E:35:23:87:1C:DF:5B:1F:F0:37:5C:FD:D7:2D:BD:B0:43:B4:F3:3D:65:5F:10:7C:3D:
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%2Fgoogle.com 
curl -s '/api/v1/ssl/cert?q=https%3A%2F%2Fgoogle.com'
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