v1.1 Now Available

Instant WHOIS Lookup
for 200+ TLDs

Check domain availability, monitor expiry dates, and view complete registration details in one click. No login required.

download Install Extension play_circle View Features
all_inclusive 200+ TLDs
security Privacy-Focused
bolt Instant Results

Powerful Features

Everything you need for domain research and monitoring, right in your browser.

search

Instant WHOIS Lookup

Get comprehensive domain registration details, expiry dates, and nameserver information in seconds.

public

200+ TLD Support

Works with .com, .net, .org, .io, .ai, and 200+ more TLDs. Comprehensive coverage for your research.

check_circle

Availability Checker

Instantly check if domains are available for registration. Quick TLD buttons help you test alternatives.

alarm

Expiry Monitoring

Track expiration dates at a glance. Visual warnings alert you to domains nearing expiry.

dns

Nameserver Details

View complete DNS configuration including nameservers, registrar information, and domain status.

lock

Privacy-Focused

All data stored locally. No tracking, no external analytics, no personal data collection.

See It In Action

Experience the power and simplicity of instant domain lookup.

Search & Discover

Check Multiple TLDs Instantly

Type any domain and instantly see availability across 8+ popular TLDs. Get direct links to register available domains with your favorite registrar.

  • check_circle Color-coded availability status
  • check_circle Direct registrar marketplace links
  • check_circle Quick visit buttons for taken domains
search example star
example.com
Available open_in_new
example.net
Taken info
example.org
Available open_in_new
example.io
Available open_in_new
WHOIS Lookup

Complete Domain Information

Get comprehensive WHOIS data in a clean, organized view. Track registration dates, expiration, nameservers, and status codes all in one place.

  • check_circle Registration & expiry tracking
  • check_circle Registrar information
  • check_circle Nameserver & DNS details

example.com

Registered
event Registration
Registered:
August 14, 1995
Expires:
August 13, 2025
Updated:
July 09, 2024
business Registrar
MarkMonitor Inc.
dns Nameservers
a.iana-servers.net
b.iana-servers.net

How It Works

Get started in seconds - no setup required

1

Install

Add the extension from Chrome Web Store in just 5 seconds. Free forever, no account needed.

2

Click

Open the extension from your toolbar or press Alt+Shift+D anywhere on any page.

3

Search

Type any domain name and get instant WHOIS data with registration details, expiry dates, and more.

Supported TLDs

200+ top-level domains including all major extensions

.com .net .org .io .ai .dev .app .co .me .info .xyz .tech .online +180 more

Frequently Asked Questions

Everything you need to know about Domaintoolbelt

help_outline

Is Domaintoolbelt free?

Yes! Domaintoolbelt is completely free to use with no hidden costs, subscriptions, or premium features. All functionality is available to everyone at no charge.

help_outline

What TLDs are supported?

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.

help_outline

Is my data private and secure?

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.