Free SEO Tool
Domain Availability Checker
Bulk-check whether domains are available to register. Paste up to 50 domains, one per line, and get instant Available / Taken status — Available results include a one-click register link.
- Free · no sign-up
- Bulk: up to 50 domains
- RDAP-backed (real-time)
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About this tool
Bulk-check whether domains are available to register. Paste up to 50 domains, one per line, and get instant Available / Taken status — Available results include a one-click register link.
Frequently asked questions
How accurate is the result? #
We query the official RDAP server for each domain — the modern replacement for WHOIS that all major registries publish. A 200 response with a registration date means Taken; a 404 means Available. Some smaller TLDs do not publish RDAP, in which case we report "Unknown" rather than guess.
Why is there a 50-domain cap? #
RDAP servers are operated by registries as a free public service. Capping bulk checks at 50 keeps us a polite citizen and protects you from getting rate-limited mid-batch.
What does the "Register" button do? #
It opens the registrar (Spaceship by default) pre-loaded with the available domain in the cart funnel. The link is an affiliate link — if you complete the registration we may earn a small commission at no extra cost to you. Buttons are clearly labelled.
Do you log the domains I check? #
We log the tool slug, country code, latency and the count of domains checked (e.g. "12 domains checked") for capacity planning — never the domain list itself or any specific domain you queried. Lookups are not associated with your account.