Every tool you need to diagnose, secure, and speed up your site, in one place. Run a DNS lookup, trace ownership, check blacklists, validate email, scan headers, and more. Free, instant, no signup.
Check your website's DNS propagation.
Trace ownership of your domain.
Get insights about your IP address.
Check if your website is blacklisted.
Check DMARC email configuration.
Validate your domain's SPF record.
Verify your DKIM signing record.
See which servers handle your mail.
Find the hostname behind an IP.
Break down any IP and CIDR range.
Check your certificate and expiry.
Audit your site's security headers.
Find known flaws in WordPress plugins.
Detect the WordPress version a site runs.
Grade your site's real-world speed.
Premium hosting for WP sites that can’t go down.