LDNS Browser Extension
Instant DNS lookups, WHOIS data, and email security analysis - right from your browser toolbar.
Features
DNS Records
Look up A, AAAA, MX, TXT, NS, SOA, CAA, DNSKEY, and more record types instantly.
WHOIS/RDAP
Domain registration data with WHOIS fallback for ccTLDs that don't support RDAP.
Email Security
Analyze SPF, DMARC, MTA-STS, and BIMI records with provider detection.
Server Info
HTTP headers, redirect tracing, and response analysis for any domain.
Multiple DNS Providers
Choose between Cloudflare, Google, and DNS.SB for DNS-over-HTTPS queries.
Dark & Light Themes
Switch between dark and light themes to match your preference.
Recent Searches
Quick access to your last 10 domain lookups, stored locally.
Privacy Focused
No data collection, no tracking. All queries go directly to public DNS services.
Privacy First
- ✓ No data collection or analytics
- ✓ No tracking or telemetry
- ✓ All queries go directly to public DNS services
- ✓ Recent searches stored locally only
- ✓ Open source and transparent
How It Works
Click the extension icon
The current tab's domain is automatically detected and loaded.
View DNS records instantly
See all DNS records, WHOIS data, and email configuration in organized tabs.
Look up any domain
Type any domain to analyze it, or select from your recent searches.
Ready to get started?
Install the extension and start looking up DNS records in seconds.