Check domain availability, monitor expiry dates, and view registration details in one click. No login required.
Everything you need for domain research and monitoring, right in your browser
Get comprehensive domain registration details, expiry dates, and nameserver information in seconds. No waiting, no delays.
Works with .com, .net, .org, .io, .ai, and 200+ more TLDs. Comprehensive coverage for all your domain research needs.
Instantly check if domains are available for registration. Quick TLD buttons help you test alternatives in one click.
Track domain expiration dates at a glance. Visual warnings alert you to domains nearing expiry or in pending delete status.
View complete DNS configuration including nameservers, registrar information, and domain status codes.
Save and organize important domains in your favorites list. Quick access to domains you monitor regularly.
Lightning-fast access with Alt+Shift+D. Open the extension instantly from anywhere without reaching for your mouse.
Right-click any domain on any webpage for instant WHOIS lookup. Seamless integration with your browsing workflow.
All data stored locally on your device. No tracking, no external analytics, no personal data collection. Your privacy matters.
Experience the power and simplicity of instant domain lookup
Type any domain and instantly see availability across 8+ popular TLDs. Get direct links to register available domains with your favorite registrar.
Get comprehensive WHOIS data in a clean, organized view. Track registration dates, expiration, nameservers, and status codes all in one place.
Get started in seconds - no setup required
Add the extension from Chrome Web Store in just 5 seconds. Free forever, no account needed.
Open the extension from your toolbar or press Alt+Shift+D anywhere on any page.
Type any domain name and get instant WHOIS data with registration details, expiry dates, and more.
200+ top-level domains including all major extensions
Everything you need to know about Domaintoolbelt
Yes! Domaintoolbelt is completely free to use with no hidden costs, subscriptions, or premium features. All functionality is available to everyone at no charge.
We support 200+ TLDs including all major extensions like .com, .net, .org, .io, .ai, .dev, and many country-code TLDs. If a TLD doesn't have RDAP support, we use DNS lookups to check availability.
Absolutely. All your data (favorites, search history, preferences) is stored locally on your device using Chrome's secure storage API. We never collect personal data, browsing history, or send data to external servers except for WHOIS queries to legitimate RDAP services.
The extension requires an internet connection to fetch WHOIS data from RDAP servers. However, cached results are available offline for 5 minutes, and your favorites list is always accessible.
Press Alt+Shift+D (Windows/Linux) or Alt+Shift+D (Mac) from anywhere on any page to instantly open the extension. You can customize shortcuts in Chrome's extension settings (chrome://extensions/shortcuts).
We query multiple reliable sources including IANA RDAP Bootstrap, Verisign RDAP (for .com/.net), and Who-dat API. We use parallel queries to ensure fast and reliable results from the most authoritative sources.