JavaScript Networking DNS

DNS Lookup

Type any domain and get A, AAAA, MX, CNAME, TXT, and NS records back instantly. Runs entirely in the browser using Google's DNS-over-HTTPS API : no backend, no installs.

BackendNone : browser only

DNS providerGoogle DoH

Record types6 (A, AAAA, MX, CNAME, TXT, NS)

DependenciesNone

GitHub →

Live Demo

Enter a domain and select record types to query.

Try:

Enter a domain above and click Lookup

How it works

Input

User types a domain and selects record types

→

DoH query

fetch() calls Google's dns.google/resolve for each type

→

Parse JSON

Responses are standard JSON : no DNS parsing needed

→

Render

Records grouped by type in a scrollable table

Decisions

Google DoH over Cloudflare

Both support CORS. Google's dns.google/resolve returns clean JSON with a simple query parameter. Cloudflare needs an Accept header which some browser configs handle differently.

No backend

DNS-over-HTTPS is a public API with CORS support. Running a backend proxy would add latency and a server dependency for zero benefit.

Parallel queries

All selected record types fire simultaneously with Promise.all. Six queries still complete in under 200ms for most domains.

Toggle record types

Querying all 6 types every time adds noise. Toggling lets users focus on what they need : useful when debugging MX records specifically.