Domain Combiner
Two word lists in, every combination out, each one checked against the registry that actually owns the answer.
0 words
0 words
0 domains to check
Nothing checked yet
Put words in both lists, pick your extensions, and we will cross them into every combination and ask each registry which ones are still free.
Why check with this instead of a registrar search
Every combination
Cross both lists forwards, backwards, and hyphenated across as many extensions as you want, deduped automatically.
Straight from the registry
Answers come from the registry's own RDAP service, not a reseller's search box that quietly holds names it shows you.
No server of ours in the loop
Your browser talks to the registries directly. We have no account system, no logs, and nothing to sign up for.
How the domain combiner works
Most naming sessions stall in the same place: you have a rough idea of the two halves of the name, but checking every pairing by hand at a registrar takes an afternoon. This does the crossing and the checking in one pass.
- 1
Write two word lists
One word per line. List A is usually the distinctive half (fiery, swift, north) and list B the category half (tools, labs, works). Press Related words on either list if you want more to work with.
- 2
Pick how they join
Forward gives fierytools, reversed gives toolsfiery, hyphenated gives fiery-tools. Add extensions beyond .com and the count multiplies out, shown live before you commit to a run.
- 3
Check them all at once
Every candidate is queried against the registry that runs its extension, six at a time. Results fill in as they land, available first, ready to copy or export as CSV.
Frequently Asked Questions
How does the availability check work?
Your browser asks each registry directly using RDAP, the protocol that replaced WHOIS. A 404 means nobody has registered the name, a 200 means somebody has. The lookups go from your browser to the registry, never through a server of ours.
Is a domain marked available definitely registrable?
Usually, but not always. Registries return the same 404 for names that are reserved, blocked, or held back as premium inventory. Treat available as a strong shortlist signal and confirm the ones you like at a registrar.
Why is .co greyed out?
The .co registry answers RDAP but does not send the CORS header a browser needs to read the response, so there is no honest way to check it client-side. Rather than report every .co as unknown, we disable it. Every other extension on the list is checked for real.
What does the Related words button do?
It suggests words associated with the ones already in that list, so you can widen a shortlist without thinking of everything yourself. Suggestions are offered as chips you tap to add, never inserted automatically: the number of combinations is the two lists multiplied together, so silently appending ten words per line would take a short list past the run limit in one click.
How many domains can I check at once?
Up to 2,000 in one run. Past 500 we ask you to confirm first, because registries rate-limit long bursts and a run that big takes a few minutes.
Where do my word lists actually go?
We store nothing. There is no account and no server of ours in the loop. Two things do leave your browser, both going straight to a third party rather than through us: each candidate domain goes to its registry to be checked, and if you press Related words, the words in that list go to the Datamuse API. The only thing kept on your machine is which extensions you ticked, in local storage so they survive a reload.