Create exhaustive lists of all possible domain combinations with custom constraints.
Select from list or enter custom TLD
Estimated Combinations
474,552
⚠️ Large count detected. Generation limited to 50,000 domains.
Professional Domain Combination Generator
4.8(89 reviews)
50K+
Max Domains
9,700+
TLDs Available
7
Export Formats
Free
Always
Complete Guide to Domain Combination Generation
Domain combination generation is the systematic creation of all possible domain name combinations within specified constraints. Whether you're a domain investor searching for available short domains, a developer building availability testing systems, or a researcher analyzing domain patterns, this tool creates comprehensive lists based on your exact requirements.
Why Generate Domain Lists?
Domain Investment: Find available short domains, premium patterns, or specific character combinations by generating exhaustive lists and checking availability in bulk.
Availability Testing: Developers building domain search engines or availability checkers use generated lists to test their systems and build comprehensive databases.
Pattern Analysis: Researchers analyze domain registration patterns, availability trends, and character usage across TLDs by generating and comparing large domain sets.
Brute Force Search: When looking for specific combinations (3-letter domains, numeric domains, etc.), generate all possibilities to identify available options.
Database Building: Create reference databases of all possible domains for testing, validation, or autocomplete features in applications.
Competitive Analysis: Generate competitor domain patterns to discover naming strategies and identify gaps in your market segment.
How the Generator Works
The tool uses combinatorial mathematics to systematically generate every possible domain combination:
Example: 3-Character Domains with Letters Only
With min=3, max=3, letters only, the tool generates: aaa.com, aab.com, aac.com... zzz.com (17,576 combinations). Each position can have any of 26 letters, creating 26³ possible domains.
⚠️ Exponential Growth Warning
Combinations grow exponentially. Adding just one character or including numbers can increase results from thousands to millions. The tool estimates combinations before generation and caps at 50,000 for performance.
Key Features
Custom Constraints
Set minimum and maximum character length (1-63), choose character types (letters, numbers, dashes), and select from 9,700+ TLD extensions. Complete control over generation parameters.
Exhaustive Generation
Generates all possible combinations within your constraints using systematic algorithms. No possibilities missed - perfect for finding every available domain in a specific pattern.
Domain Validation
Automatically validates domain naming rules: no leading/trailing dashes, no consecutive dashes, proper character usage. Only generates valid, registrable domain names.
7 Export Formats
Export to TXT, CSV, JSON, XML, Excel, YAML, or SQL. Import directly into spreadsheets, databases, registrar bulk tools, or custom applications. Professional formats for every use case.
9,700+ TLDs
Generate with any official TLD: .com, .net, .org, country codes (.uk, .de, .jp), new gTLDs (.tech, .store, .app), and more. Complete IANA registry coverage.
Real-Time Estimation
See the exact number of combinations before generation. Adjust constraints in real-time and watch the estimate update instantly. Prevents unexpected massive lists.
100% Client-Side
All generation happens in your browser. No data sent to servers. Your domain lists and strategies remain completely private. Perfect for confidential projects.
Performance Safeguards
50,000 domain generation limit prevents browser freezing. Paginated display (1,000 at a time) keeps the interface responsive. Export full lists even when display is limited.
Frequently Asked Questions
What is the Domain Combination Generator tool?
The Domain Combination Generator is a powerful tool that creates all possible domain name combinations based on your custom constraints. You specify the character length range (min/max), character types (letters, numbers, dashes), and TLD extension, and the tool generates every valid combination within those parameters. It's perfect for finding available short domains, testing domain availability patterns, or building comprehensive domain lists for research and analysis.
How does the domain generation algorithm work?
The generator uses a systematic combinatorial algorithm to create all possible permutations:
1. Character Set Construction: Based on your selections (letters a-z, numbers 0-9, dashes), the tool builds a character set. 2. Permutation Generation: For each length in your min-max range, it generates all possible combinations of characters from the set. 3. Validation: Each combination is validated to ensure it meets domain naming rules (no leading/trailing dashes, no consecutive dashes). 4. TLD Concatenation: Your selected TLD is appended to each valid combination.
For example, with min=2, max=2, letters only, you get: aa.com, ab.com, ac.com... zz.com (676 domains).
What's the maximum number of domains I can generate?
For browser performance and practical use, the tool limits generation to 50,000 domains per session. This prevents browser freezing and ensures smooth operation. The 'Estimated Combinations' display shows you how many domains will be created before you generate. If your constraints would produce more than 50,000 combinations, the tool will generate the first 50,000 and notify you. To generate larger sets, adjust your constraints (reduce max length, limit character types, or use multiple generations with different settings).
Can I generate domains with specific patterns like 'abc' or 'xyz' only?
Currently, the tool generates all possible combinations within your constraints rather than specific patterns or prefixes. It's designed for exhaustive generation. If you need specific patterns (like domains starting with 'tech' or ending with 'shop'), you can: (1) Generate a broader set and filter results using your text editor or spreadsheet software, (2) Use the export feature to download results and apply pattern matching with tools like grep, regex, or Excel filters. For advanced pattern-based generation, consider using the Premium Domain Generator tool which offers more targeted generation options.
What export formats are available?
Export your generated domains in 7 professional formats:
Plain Text (.txt): One domain per line, perfect for blocklists, registrar bulk checks, or simple lists. CSV (.csv): Includes domain, length, and TLD columns. Import into Excel, Google Sheets, or databases. JSON (.json): Structured format for APIs, scripts, or programmatic processing. XML (.xml): Standard XML format for enterprise systems and legacy applications. Excel (.xlsx): Native Excel format with proper formatting and columns for immediate analysis. YAML (.yaml): Human-readable format for configuration files or modern applications. SQL (.sql): Ready-to-execute INSERT statements for direct database import with a pre-defined table schema.
All exports include the full list of generated domains with metadata.
Why does the estimate show millions of combinations?
The estimated combination count grows exponentially based on your constraints. Here's why numbers get large quickly:
Character set size matters: With letters only (26 chars), numbers only (10 chars), or both (36 chars), the combinations multiply fast. Length range multiplies results: If you select min=3, max=5, you generate 3-char + 4-char + 5-char combinations.
The tool caps generation at 50,000 to keep your browser responsive. Adjust your constraints to reduce the estimate.
Can I use this to find available domains?
The Domain Generator creates lists of possible domains, but it doesn't check availability. Think of it as a comprehensive domain name list builder. To check availability: (1) Generate your domain list with this tool, (2) Export to CSV or TXT, (3) Use domain availability checkers or registrar bulk lookup tools to test availability, (4) Most registrars offer bulk WHOIS or availability check APIs for large lists. This two-step approach lets you focus generation on specific patterns, then check only the combinations you're interested in. For instant availability checking of individual domains, use our Domain Checker tool instead.
What are valid character constraints for domains?
Domain names have specific technical requirements enforced by this tool:
Restrictions: • Minimum length: 1 character (though 2-3 is more practical) • Maximum length: 63 characters per label (255 total with TLD) • No leading or trailing hyphens (abc-.com is invalid) • No consecutive hyphens (ab--c.com is invalid) • Cannot be all numbers unless specific TLD rules allow it
The generator automatically validates these rules and excludes invalid combinations.
How do I use generated domains for bulk registration?
While this tool generates domain lists, it doesn't handle registration. Here's the typical workflow: (1) Generate your domain list using desired constraints, (2) Export to CSV or TXT format, (3) Upload to your domain registrar's bulk registration tool (most major registrars support this), (4) The registrar will check availability and show pricing, (5) Select which available domains to register. Note: Many registrars have daily registration limits (typically 50-500 domains per account). For large-scale registration projects, consider domain reseller accounts or work with a domain broker who can handle bulk orders more efficiently.
Can I generate domains with specific TLDs like .co.uk or .com.au?
Currently, the tool supports first-level TLDs only (.com, .net, .org, .uk, etc.) from our database of 9,700+ extensions. For country-specific second-level domains (like .co.uk, .com.au), you can: (1) Generate with the first-level TLD (.uk, .au), (2) Export the results, (3) Use find-and-replace in Excel or a text editor to convert .uk to .co.uk or .au to .com.au. Alternatively, generate with .com first, then modify the exported file. We're considering adding second-level TLD support in a future update based on user demand.
What's the difference between this and a premium domain generator?
The Domain Generator creates exhaustive lists based on pure combinatorial logic - every possible combination of characters. The Premium Domain Generator (our other tool) uses linguistic and pronounceability algorithms to generate 'premium' domains that sound good, are memorable, and follow natural language patterns. Use this tool when you want complete coverage of all possibilities within constraints (great for finding short available domains or systematic analysis). Use the Premium Generator when you want brandable, pronounceable names that sound professional (better for business naming, startups, or projects where brand quality matters).
Is there a way to filter results after generation?
The tool doesn't include built-in filtering, but you can easily filter after export: (1) Generate your full list, (2) Export to CSV or Excel, (3) Use spreadsheet filters/formulas to find domains matching your criteria (e.g., contains 'tech', starts with 'app', exactly 4 chars), (4) For advanced filtering, export to TXT and use command-line tools like grep. For example: grep '^a' domains.txt finds domains starting with 'a'. This approach gives you more flexibility than built-in filters and lets you use your preferred tools for complex pattern matching.
Common Use Cases
1. Finding Available Short Domains
Short domains (2-4 characters) are valuable but rare. Generate all 2-3 letter .com domains, export the list, and use bulk WHOIS checkers to find available options. Domain investors use this approach to discover premium domains before they're registered.
2. Building Domain Availability Databases
Developers building domain search services need comprehensive lists for testing and validation. Generate domains by pattern, check availability via registrar APIs, and build databases showing which combinations are taken vs. available across different TLDs.
3. Researching Domain Patterns
Market researchers analyze which character patterns are popular (numeric domains, vowel-heavy, etc.) by generating pattern-specific lists and checking registration rates. This reveals trends in domain investment and naming strategies across industries.
4. Systematic Brand Name Search
When your brand name must fit specific criteria (exactly 5 letters, starts with 'tech', no numbers), generate all matching combinations. This ensures you've considered every possible option before making a final naming decision.
Ready to generate your domain list? Configure your constraints above and start creating!