Vovsoft Domain Checker: Bulk Domain Availability Checks from Your Desktop
Domain Checker is a $19 Windows program from Vovsoft that checks whether long lists of domain names are free or taken, through WHOIS and RDAP lookups, and shows each taken domain's expiry date. It also generates candidate names by character pattern, formula, word list or mixed words. The $19 is a one-time lifetime license, and there's a free trial.
Registrar search boxes take one name at a time and try to upsell you. This lets you brainstorm thousands of names and see which are open, with no registrar watching what you search.
Quick facts
- Version: 10.5, released July 16, 2026
- Developer: Vovsoft
- Platform: Windows 11, 10, 8/8.1, 7 and Vista, 32-bit and 64-bit. No Mac version
- Lookups: RDAP first, then WHOIS (TCP port 43), with a server list you can edit
- TLDs: 1,000+ built in, and you can add more. Internationalized (IDN) and emoji domains work
- Capacity: up to 100 million names, loaded from TXT or CSV
- Export: PDF, CSV and TXT
- Editions: installer (6.54 MB) and portable (6.77 MB), one license for both
- Price: $19, one-time payment, lifetime license with free updates
- Trial: free to try, without multi-threading or unlimited checks, for personal, non-commercial use
- What we checked: installer file version 10.5.0.0 (6,861,056 bytes) with a valid code signature, downloaded from the vendor on November 11, 2026, and $19.00 on the order page with no auto-renewal on November 11, 2026. We didn't run a bulk scan
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Overview
Type a name and click Add, or fill the list with one of the generators along the top toolbar, then press Check All. Each row shows the domain, its length, AVAILABLE or Not Available, the expiry date of taken names, and the server's status and response time. The status bar keeps totals of checked, available and taken names.
A finished run of 676 .com names: 5 available, 671 taken, with each taken name's expiry date, in under 10 seconds.
Features
Name generators
Domain Checker builds candidate lists for you: Domains by Char (combinations of characters), Domains by Formula, Domains from File (a word list, with optional prefix and suffix words), Mix Words (cross-mixing two word lists), a Domain Wizard, and Domains for all TLDs. It can also extract domain names from pasted text.
Fast, long-running scans
Domain Checker can use every CPU core with multi-threading (licensed version), run for hours, and pause between checks with a delay you set. The delay matters: WHOIS servers limit how many checks you can make per minute, and a longer delay avoids Try Again Later errors.
WHOIS details and proxies
Domain Checker queries RDAP servers first and falls back to WHOIS, shows expiry dates with exact times, can save raw WHOIS answers to a folder, and can route lookups through a SOCKS proxy.
A scan of six-letter .io names in progress, with server status and response time per row and the generator buttons along the top.
Real-World Uses
- A startup founder checks 300 brainstormed names across .com, .io and .ai in one run.
- A domain investor generates every four-letter .com combination and scans it overnight with a delay.
- A brand manager checks which country-code versions of the company name are still free.
- An agency exports the available names to PDF to show a client a shortlist.
Who It's For, and Who Should Skip It
It suits domain investors, naming agencies, developers and founders who check names by the hundred, not one at a time.
Skip it if you only need to check a few names: any registrar's search does that free. It also doesn't show prices, domain age, creation dates or whether a taken site is parked, all open requests, so domain flippers who need appraisal data will want another tool alongside it (Vovsoft sells a separate Bulk Domain Appraisal).
Usage Guide
- Download the installer or the portable edition and start Domain Checker.
- Type a name and click Add, or use Domains by Char, Domains by Formula, Domains from File, Domain Wizard or Mix Words to build a list.
- For big lists, turn on Settings > Enable Multiple-Threading (licensed) and set Settings > Delay to 0.
- If you see Try Again Later or Bad Response, raise the delay to a few seconds and run it in the background.
- Press Check All, then export the results to PDF, CSV or TXT.
Before you buy
Domain Checker relies on public WHOIS and RDAP servers, which Vovsoft doesn't control, so confirm a name at your registrar before you count on it being free. One license covers one person on any number of their own computers. Vovsoft's general policy is no refunds once the key is delivered, since a free trial comes first (accidental orders are generally refunded, at its discretion, and PayPro Global has the final say on its orders).
Where it falls short
- Busy WHOIS servers throttle bulk checks, so big scans of some TLDs take hours with a delay.
- No watch list to track a taken domain's status changes, the most requested feature.
- No pricing, domain age, creation date or registrant name, and no rotating proxies.
- Results for TLDs with flaky WHOIS servers can come back as Bad Response, as one user found with expired domains.
What Users Say
On Vovsoft's site
Domain Checker's page shows 4.4 out of 5 from 10 ratings, with these comments among others.
"There are a lot of domainchecker websites out there but it is nice to have a powerful and handy app like this. I've checked thousands of domain-names without any problems so far." Kailum O'Quinn
"Easy download and install. No hoops to jump. And the program is lite and seems to work as advertised. A time saver!" Mark S
"I tested hundreds of domain names with this domain tester. It is fast and deserves its money." Anonymous User
Problems reported
On Vovsoft's FAQ page, a user wrote: "I've been using your domain checker for the last 5 months it is good but recently I found a problem with this application when I put expired domain the domain said bad response". Vovsoft replied that the WHOIS server was probably having a temporary problem.
Vovsoft as a company has a TrustScore of about 4.6 out of 5 from 411 reviews on Trustpilot, read through a summarizer. Users like the speed and the bulk checks. The complaints come back to WHOIS servers that throttle or fail.
Comparisons
Domain Checker vs registrar bulk search
Registrar bulk searches are free and show prices, but cap how many names you can paste and log what you look for. Domain Checker has no practical cap, generates names for you and exports results, but shows no prices.
Domain Checker vs Vovsoft Bulk Domain Appraisal
Domain Checker answers "is it free?". Bulk Domain Appraisal estimates what a name is worth through the GoDaddy API. Both come under Vovsoft's $99 Universal License.
Editions and Pricing
| Edition | Price | License | What you get |
|---|
| Trial | Free | Personal, non-commercial use | Availability checks without multi-threading or unlimited checking |
| Licensed | $19 one-time | Lifetime | Multi-threading, unlimited checks, commercial use, no nag screen or ads, lifetime free updates |
The installer and portable editions use the same key, sent by email right after payment. Vovsoft's $99 Universal License covers all of its desktop programs.
FAQs
How many domains can Domain Checker check at once?
Domain Checker handles lists of up to 100 million names, loaded from TXT or CSV files. Speed depends on the WHOIS servers, which limit checks per minute.
Why does Domain Checker show Try Again Later or Bad Response?
The WHOIS server for that TLD is limiting you or having trouble. Raise Settings > Delay to 1 or 10 seconds and let Domain Checker run longer in the background.
Can Domain Checker check emoji and non-English domains?
Yes. Domain Checker supports internationalized (IDN) and emoji domain names.
Does Domain Checker register domains?
No. Domain Checker only checks availability and expiry dates. You register the name at any registrar you like.
Can I add a TLD that Domain Checker doesn't know?
Yes. Domain Checker's WHOIS server list is user-definable, so you can add a TLD's server yourself.
Is the Domain Checker license a subscription?
No. The $19 license is a one-time payment that never expires and includes future updates.
System Requirements
- Windows 11, 10, 8/8.1, 7 or Vista, 32-bit or 64-bit
- About 7 MB of disk space
- An internet connection (WHOIS port 43 and RDAP must not be blocked)
Conclusion
Domain Checker is worth $19 if you search for domain names in bulk, whether for a new brand or as an investor. The reason to buy it is the combination of name generators and fast bulk WHOIS and RDAP checks in one window. The reason not to: casual one-off searches are free at any registrar, and it gives no prices or appraisal data.
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