Domain Checker

Electron app for bulk domain availability checking. Queries WHOIS, RDAP, and DNS.

Setup

cd domain-checker
npm install
npm start

Usage

1. Toggle desired extensions (.com, .net, .io, .org)
2. Enter base domain names (one per line, no extensions)
3. Click "Check Domains" (or Ctrl+Enter)
4. "Copy Available" copies all available domains to clipboard

How it works

For each domain, the app tries three methods in order:

1. WHOIS — most reliable, checks WHOIS records directly
2. RDAP — IANA's modern replacement for WHOIS, used as fallback
3. DNS — last resort, checks if DNS records exist (less reliable)

A 0.8s delay between checks avoids rate limiting.

Build portable .exe

npm run build