Bulk Domain Checker
Paste a list of domain names to check their availability in bulk. Perfect for validating domains generated from other tools.
How It Works
Validate domain availability for any list in seconds. Perfect for checking domains from spreadsheets, other generators, or brainstorming sessions.
Paste Your List
Copy domains from any source - spreadsheets, text files, CSVs, or other domain generators. Any format works.
Automatic Parsing
We automatically detect and parse domain names, removing duplicates, invalid entries, and formatting issues.
Bulk Check
Click to check availability for all domains at once. Results update in real-time as each domain is verified.
Export Results
Copy all domains or just the available ones. Each available domain links directly to registration.
Supported Input Formats
One domain per line
example.com\nmydomain.io\nstartup.ai
Comma-separated
example.com, mydomain.io, startup.ai
Space or tab separated
example.com mydomain.io startup.ai
URLs with protocols
https://example.com automatically extracts the domain
Mixed formats
Combine any of the above - we'll figure it out
Automatic Filtering
Invalid domains removed
Entries without a valid TLD are filtered out
Duplicates removed
Each domain appears only once in results
Protocols stripped
http://, https://, and www. are removed
Paths removed
example.com/page becomes example.com
Normalized to lowercase
EXAMPLE.COM and example.com are treated the same
Common Use Cases
Spreadsheet Validation
Have a list of potential domains in Excel or Google Sheets? Copy the column and paste here to check all at once.
Cross-Tool Verification
Generated domains with another tool? Paste them here to verify availability with our real-time checking.
Brainstorm Sessions
After a naming brainstorm, paste all ideas to quickly identify which domains are actually available.
Competitor Research
Check if variations of competitor domains are available for your brand protection strategy.
Portfolio Management
Domain investors can validate lists of potential acquisitions before making purchasing decisions.
Client Presentations
Agencies can verify domain options before presenting to clients, ensuring all suggestions are actually available.
Frequently Asked Questions
How many domains can I check at once?
You can check up to 100 domains at a time. This limit ensures fast, reliable results and prevents API overload. For larger lists, simply run multiple batches.
How accurate are the availability results?
Results are checked in real-time against domain registrar databases. However, domain availability can change within minutes, so we recommend registering available domains promptly and verifying with your registrar before purchase.
Why was my domain marked as invalid?
Domains must include a valid TLD (like .com, .io, etc.) and be at least 4 characters total. Entries that don't match this format are automatically filtered. Make sure your domains include the extension.
Can I check domains with any TLD?
Yes! Unlike other tools that limit you to specific TLDs, the bulk checker works with any valid domain extension - from common ones like .com and .io to country-codes and new gTLDs.
What do the different status indicators mean?
Green checkmark = available for registration. Red X = already registered. Yellow warning = couldn't be checked (network issue or invalid format). Spinning = currently being checked.
Pro Tips
Copy from Excel
Select a column in Excel or Google Sheets and Ctrl+C / Cmd+C. Paste directly into the text area - one domain per cell works perfectly.
Check Multiple TLDs
Test the same name across TLDs by listing mybrand.com, mybrand.io, mybrand.ai all at once to see which are available.
Register Quickly
Domain availability changes fast. When you find an available domain, click the external link icon to register immediately.
Export for Records
Use "Copy Available" to get a clean list of just the available domains for your records or to share with your team.
Combine with Other Tools
Use our Domain Generator or AI Generator to create names, then paste results here for a second verification pass.
Check Typos & Variations
Include common misspellings and variations of your brand name to identify potential trademark or typosquatting concerns.