Site diagnostics
Free website diagnostic tool is live: SSL, DNS, security, and availability in one scan
After months of development, I'm excited to share a free website diagnostic tool that checks SSL, DNS, security headers, availability, and more in one scan.
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It came from years of supporting websites and spending too much time jumping between separate tools just to understand why a site was down. I wanted one button that runs all key checks and shows what's wrong.
Now it's live. If you work with websites, I'd really appreciate it if you gave it a try and shared feedback.
What the website checker analyzes
The tool helps determine whether a website issue is global or local and gives a structured reliability snapshot in seconds.
- Domain status and WHOIS-related visibility
- DNS records: A, AAAA, CNAME, MX, TXT, NS
- Resolved website IP and network context
- Ping availability from multiple locations
- Hosting provider lookup
- Public URL accessibility check
- SSL certificate expiration, issuer, and validity details
Stop guessing and start diagnosing. This release is the first major milestone of a larger monitoring project at sitecenter.app.