About

Most domain tools answer one question: is this exact string free on .com. domain.check answers a better one: what should this project actually be called, and where?

You describe the project in a sentence. The tool picks the extensions that suit it - out of 1,400 in the root zone, only a few dozen deserve attention for any given idea, and many are corporate brand extensions nobody can register at all. It checks candidates live against each registry, shows the renewal price next to the first-year promotion, flags names likely to carry registry premium pricing, and suggests alternatives using open-source models.

What makes it different

• It never rounds uncertainty up to "available". Registry says no record: you see "unregistered", because reserved names look identical to free ones and only checkout is authoritative.
• Renewal prices are always shown. A $1.54 first year that renews at $31.41 is a trap, not a deal.
• Extensions are filtered by meaning. A feng shui app gets .life and .guide, not .exchange.

Availability comes from registry RDAP cross-checked against DNS. Prices are Porkbun retail for the extension. The AI layers run on open-source models on Cloudflare Workers AI.