Every domain tool
you need, for free

Estimate value, check availability, analyze health, and look up WHOIS — all in one place, no sign-up required.

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Value Estimator

Get an instant domain appraisal based on length, keywords, TLD, brandability, and more.

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Availability Checker

See if a domain is available across 10+ popular extensions in real time.

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Health Checker

Analyze DNS, SSL, response time, and server status for any live domain.

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WHOIS Lookup

Look up registration details, nameservers, expiry dates, and registrar info.

The Complete Domain Toolkit

Whether you're a domain investor evaluating your next purchase, a startup founder searching for the perfect name, or a webmaster monitoring your existing sites — check-domain.com gives you all the tools you need in one place.

Built for Speed

Every tool runs entirely in your browser. There are no server-side processes, no queues, and no waiting. Enter a domain and get results in under a second.

Privacy First

We don't store your queries, track your searches, or require any personal information. All lookups happen client-side using public APIs like RDAP and Google DNS.

Always Free

No premium tiers, no usage limits, no sign-up walls. Every tool on check-domain.com is free to use as many times as you like.

Frequently Asked Questions

What tools are available?
We offer four free tools: a Domain Value Estimator that appraises domain worth, an Availability Checker that scans 10+ extensions, a Health Checker that analyzes DNS/SSL/server status, and a WHOIS Lookup that reveals registration details.
Do I need an account?
No. All tools work instantly without any registration, login, or personal information.
Is my data stored?
No. All checks run in your browser. We don't log, store, or share any of your queries or results.
How accurate are the results?
Availability and WHOIS checks query live public databases (RDAP, Google DNS) for real-time accuracy. The value estimator uses industry heuristics — it's a solid starting point, though premium domains may vary from estimates.