Free, fast tools for everything around domain names — WHOIS lookup, age and expiry checks, bulk availability, DNS and email diagnostics, registrar price comparison, and brandable name generation. No signup, no throttling on first results, real registry data.
Look up registration data, age, expiration, and lifecycle phase for any registered domain. Powered by authoritative WHOIS/RDAP records from each registry.
See when a domain was first registered and how old it is in years, months, and days. Useful for backlink quality, brand history, and SEO due diligence.
Find the exact expiration date and a live countdown of days remaining. Spot domains close to expiring before someone else does.
Decode EPP status codes (redemptionPeriod, pendingDelete, autoRenewPeriod) to see if an expired domain is grabbable, locked, or already gone.
Generate name ideas, check hundreds of TLDs in parallel, and discover existing subdomains via Certificate Transparency.
Turn a seed keyword into brandable, available variants across TLD groups. Brandability scoring filters out hard-to-pronounce or numeric-heavy results.
Stream availability across 100+ TLDs in parallel for a single label. Filter to available, registered, or premium and export the result as CSV.
Discover subdomains for any domain using public Certificate Transparency logs. See first-seen and last-seen dates, issuers, and certificate counts.
Diagnose DNS, hosting, and email authentication. Resolve A/AAAA/MX/TXT/CAA records and grade your SPF + DKIM + DMARC posture.
Resolve A and AAAA records, follow CNAME chains, and inspect MX, TXT, NS, and CAA records via Cloudflare DNS-over-HTTPS.
Audit MX, SPF, DKIM, and DMARC. Get an A–F grade, provider detection (Google, Microsoft, Zoho, Proton, Mailgun, etc.), and concrete fixes for failing checks.
Compare register and renewal prices across TLDs and registrars, find the cheapest legitimate names, and estimate signal value before you buy.
Compare first-year and renewal prices across .com, .ai, .io, .xyz and more. See the registrar offering the cheapest renewal, not just the teaser register price.
Find the lowest-priced available domains for a label. Honest renewal pricing — no $0.99 first-year traps with a $40 renewal hidden in fine print.
Score a domain on a 0–100 signal scale across TLD, length, readability, age, traffic, and premium tokens. Methodology and weights published.
Several tools cover overlapping problems. Use this quick decision guide to pick the right one for your job.
Start with the homepage WHOIS lookup. If you need the registration date specifically, use Domain Age Checker. For expiration and renewal status, use Domain Expiry Checker.
If you have a brand idea, run it through Domain Name Generator. If you want a specific name across many TLDs, use Bulk Domain Search. If price is the main constraint, use Cheap Domain Finder or compare TLDs with TLD Price Comparison.
Use Expired Domain Checker. It reads EPP status codes (redemptionPeriod, pendingDelete, autoRenewPeriod) and estimates the public drop date, so you know whether to wait, contact the owner, or pursue a backorder.
Run Domain Value Checker for an appraisal-style signal score. Cross-check the age and history with Domain Age Checker, and use the Wayback Machine to inspect prior content.
Use Email Domain Checker for an SPF + DKIM + DMARC scorecard. Pair it with Domain To IP to verify MX hosts resolve correctly.
Map the attack surface with Subdomain Finder (Certificate Transparency logs), check email auth posture with Email Domain Checker, and verify DNS hosting with Domain To IP.
Most "domain tool" sites are thin lead-generators for a registrar. Search for a name, see the result, and the only buttons take you straight to a checkout page that quietly upsells privacy, email, SSL, and a five-year renewal. The data is correct but the experience is designed to convert, not to inform.
Query.Domains takes the opposite approach. Every tool here is built to answer a single, well-defined question with the cleanest data we can pull from authoritative sources — registry WHOIS/RDAP servers, Certificate Transparency logs, DNS-over-HTTPS resolvers, and registrar price feeds. Where there's ambiguity (DKIM probing, lifecycle estimates, value scoring), we say so explicitly instead of pretending certainty.
application/dns-json content type. Reflects what an open resolver sees, not your local caching. return-prices=true, which surfaces real-time first-year and renewal prices across registrars. We compare wholesale-style. We won't sell you privacy add-ons. We won't dark-pattern you into a five-year renewal. We won't pretend a domain has a $4,800 sale price because some appraisal API said so — domain value is fundamentally illiquid and our value tool gives you a signal score with the methodology spelled out, not a fake dollar figure. We won't gate the second result behind a signup wall.
For tools that involve scoring or estimation (value checker, expired domain lifecycle estimate, email grade), we publish the exact weights and decision rules on each tool page. If you disagree with a weighting, you can adjust your interpretation; you're not stuck with a black box.
The homepage handles single-domain WHOIS, RDAP, real-time availability, and registrar price quotes in one search box. Each focused tool below builds on top of that engine.
Go to homepage search