Network and Website Tools
Query a domain’s DNS, check its email setup, review a page’s sharing tags and identify a file, straight from your browser.
About this tool
These network tools query a domain’s public DNS (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV and reverse PTR lookup) over DNS over HTTPS, through Cloudflare or Google as you prefer, then compare both resolvers to follow a propagation. They also read a domain’s SPF, DMARC and DKIM records to spot common email configuration mistakes, and show your public IP address as Cloudflare sees it.
Paste a page’s HTML to check its title, description and Open Graph and Twitter Card tags, with a preview of the sharing cards. Find out whether an email address has a Gravatar image, or drop a file to learn its real format from its first bytes, whatever its extension. Tests that need a server (HTTP headers, redirects, SSL certificate, ping, whois, hosting provider) are not offered, because everything stays in your browser.
- DNS lookup: A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, PTR
- Choice of resolver: Cloudflare or Google (DNS over HTTPS)
- SPF, DMARC and DKIM check with advice
- Comparison of both resolvers (propagation)
- Your public IP address
- Meta, Open Graph and Twitter Card tags, card preview
- Gravatar checker
- Real file type from its bytes