What is DNS-over-HTTPS (DoH)?

DoH is a secure protocol for performing remote Domain Name System resolution via the HTTPS protocol, preventing eavesdropping and tampering by local network intermediaries.

How does this tool perform DNS queries without a backend server?

It connects directly from your browser to public DNS-over-HTTPS JSON APIs operated by Cloudflare (1.1.1.1) and Google (8.8.8.8) using client-side fetch.

What does DNSSEC Authenticated Data (AD) mean?

The AD flag indicates that the resolver cryptographically verified the DNS records against the domain's DNSSEC signature chain, guaranteeing they have not been spoofed.

Can I inspect mail records like MX and SPF TXT records?

Yes. Select MX to inspect mail exchange servers and priority weights, or select TXT to inspect SPF, DKIM, and DMARC verification strings.

Client-Side DNS Lookup Tool

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The browser connects to a specified external endpoint to complete the task. No payload or credential is sent to or stored on FileXShare servers.