▸ Free domain tools
Everything here runs against our own index of registered domains, subdomains and certificates. No signup, no API key, no credit card.
Typosquatting checkernew
Generate thousands of lookalike permutations of a brand across nine classes and see which ones are already registered.
Subdomain finder
List every subdomain of a domain, or search any substring across millions of hostnames captured from Certificate Transparency.
Domain search
Search the whole index by keyword, TLD and certificate authority, then export the result as CSV.
Newly registered domains
A live feed of domains appearing in zone files and certificate logs for the first time, updated continuously.
Domain watch
Get an email when a domain containing your term is registered or issued a certificate. One term is free.
Datasets
Bulk downloads: whole-TLD zone snapshots and curated slices of the index, as CSV.
Every one of these is also a JSON API, with an OpenAPI document and an MCP server: Read the API docs