Domain Availability Checker
Check live domain name availability across 40+ TLDs (.com, .io, .ai, .dev, .co, .app, .net) with real-time DNS resolution, estimated pricing.
About this tool
How to use it
- Type a brand name or keyword into the domain search input (e.g. startup, cloudflow, devpulse).
- Filter extensions by category tab (All TLDs, Popular, Tech & AI, Business, or Short & Brand) or choose a preset suggestion.
- Click Check Availability to query DNS-over-HTTPS resolvers in parallel across 40+ top-level domains.
- Inspect real-time availability badges, estimated registration costs, and click any available domain to open direct registrar checkout.
Why it matters
Traditional domain search engines force you through commercial registrar shopping carts and frequently log user queries, exposing innovative name ideas to front-running. This tool queries authoritative public DNS networks directly from your browser memory with zero tracking.
When to use it
Use this tool when brainstorming names for a new software product, startup, SaaS project, mobile app, or personal portfolio across multiple extension families simultaneously.
Good to know
Queries check NS (Name Server), SOA (Start of Authority), and A records via Cloudflare and Google DoH endpoints. Domains returning NXDOMAIN are flagged as available; however, certain registries hold specific premium or reserved terms that require final registrar checkout confirmation.
Common questions
How does this tool check domain availability without a registrar login?
The tool performs real-time encrypted DNS-over-HTTPS (DoH) queries to Cloudflare and Google public resolvers. Domains returning NXDOMAIN (DNS RCODE 3) with no active name server records are reported as available.
Are my domain searches private and protected from domain front-running?
Yes. All DNS queries originate directly from your browser client without passing through our servers. We maintain no search logs, preventing third-party domain sniping or automated price inflation.
Why might a domain show as available when it is premium or reserved by a registry?
Certain registries (.ai, .io, .co) hold specific short or dictionary words in premium reserve tiers without publishing public NS records until purchase. Clicking the registrar link allows you to confirm the exact checkout tier.
Where can I register available domains found with this tool?
You can register available domains at any ICANN-accredited registrar of your choice, including Cloudflare Registrar, Porkbun, Namecheap, or Google/Squarespace Domains.
Which top-level domains (TLDs) are supported in the search?
Over 40 extensions are supported across Tech (.io, .ai, .dev, .app, .tech), Popular (.com, .net, .org, .co), Business (.pro, .biz, .agency, .store), and Modern extensions (.me, .xyz, .cc, .cloud).