Check domain availability, monitor expiry dates, and view complete 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.
Works with .com, .net, .org, .io, .ai, and 200+ more TLDs. Comprehensive coverage for your research.
Instantly check if domains are available for registration. Quick TLD buttons help you test alternatives.
Track expiration dates at a glance. Visual warnings alert you to domains nearing expiry.
View complete DNS configuration including nameservers, registrar information, and domain status.
All data stored locally. No tracking, no external analytics, no personal data collection.
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.