Random Generator: Numbers, Strings, UUIDs & More
Generate cryptographically secure random data for development, testing, and security applications. Create random numbers, strings, UUIDs, colors, and custom data sets with flexible configuration options. Perfect for developers, testers, and security professionals.
Random Data Configuration
Data Type
Quantity
Format
Number Configuration
String Configuration
UUID Configuration
Color Configuration
Boolean Configuration
Generated Results (0 items)
No data generated yet
Configure options and click "Generate" to create random data
Generation Statistics
Quick Presets
Cryptographically Secure Generation
All random data generation uses your browser's Web Crypto API for true randomness. Generated values are never transmitted to our servers or stored anywhere, ensuring complete privacy and security.
Security Features:
- • Cryptographically secure random generation
- • Hardware-based entropy sources
- • No predictable patterns or seeds
- • Suitable for security applications
Perfect For:
- • API keys and session tokens
- • Test data and mock values
- • Database seeding and samples
- • Security tokens and nonces
What is a Random Generator?
A random generator is a tool that creates unpredictable data using cryptographic algorithms to ensure true randomness. Unlike pseudo-random generators, our tool uses the browser's crypto.getRandomValues() API to generate cryptographically secure random data suitable for security applications, testing, and development.
Features of Our Random Generator:
- Multiple data types - Numbers, strings, UUIDs, colors, booleans
- Cryptographically secure - Uses browser's Web Crypto API
- Flexible configuration - Custom ranges, character sets, formats
- Bulk generation - Generate multiple values at once
- Export capabilities - Save generated data in various formats
- Real-time generation - Instant results with live preview
- Copy-friendly interface - Easy copying of individual or bulk data
- Developer tools - API keys, test data, mock values
✅ Perfect for Professionals
- Software Developers: Test data, API keys, mock values
- Security Engineers: Tokens, salts, nonces, session IDs
- QA Testers: Random test cases and boundary testing
- Database Administrators: Sample data and unique identifiers
- Game Developers: Random events, procedural generation
- Data Scientists: Random sampling and statistical testing
How to Use the Random Generator
1. Choose Data Type
Select the type of random data you need: numbers, strings, UUIDs, colors, or boolean values. Each type has specific configuration options.
2. Configure Options
Set parameters like ranges for numbers, character sets for strings, or format preferences for colors and UUIDs.
3. Set Quantity
Choose how many random values to generate - from single values to bulk generation of thousands of items.
4. Generate and Use
Click generate to create your random data. Copy individual values or export the entire set for use in your applications.
Types of Random Data
| Type | Description | Configuration | Example Output |
|---|---|---|---|
| Numbers | Integers or decimals within range | Min/Max, Decimals | 42, 3.14159 |
| Strings | Random character sequences | Length, Character set | aB3x9K, hello123 |
| UUIDs | Universally unique identifiers | Version (v1, v4) | 550e8400-e29b-41d4... |
| Colors | Random color values | Format (HEX, RGB, HSL) | #FF5733, rgb(255,87,51) |
| Booleans | True/false values | Format preference | true, false, 1, 0 |
Common Use Cases
Development & Testing
- Test Data Generation: Random user IDs, sample records
- API Testing: Random payloads and parameter values
- Database Seeding: Populate tables with test data
- Load Testing: Generate varied test scenarios
- Mock Data: Placeholder content for prototypes
- Edge Case Testing: Boundary and stress testing
Security & Cryptography
- Session Tokens: Secure session identifiers
- API Keys: Random API key generation
- Salts & Nonces: Cryptographic salt values
- Password Generation: Secure random passwords
- CSRF Tokens: Cross-site request forgery protection
- Challenge Codes: Two-factor authentication codes
Randomness Quality & Security
🔒 Cryptographically Secure
- Web Crypto API: Uses browser's crypto.getRandomValues()
- True Randomness: Hardware-based entropy sources
- No Predictable Patterns: Statistically random distribution
- Security Applications: Suitable for tokens and keys
📊 Statistical Properties
- Uniform Distribution: Equal probability for all values
- Independence: Each value is independent of others
- Unpredictability: Cannot predict future values from past ones
- Long Period: No repetition in practical use
Advanced Features
Bulk Generation
- Generate up to 10,000 values
- Efficient memory usage
- Progress indicators
- Batch processing
Export Options
- JSON format export
- CSV file generation
- Plain text lists
- Array format output
Custom Formats
- Custom string patterns
- Weighted probability
- Exclude duplicates
- Format templates
Best Practices
✅ Security Best Practices
- Use appropriate randomness: Cryptographic for security, pseudo-random for testing
- Sufficient entropy: Use adequate length for security tokens
- Avoid reuse: Generate fresh values for each session
- Secure storage: Protect generated secrets appropriately
🔧 Development Tips
- Seed consistency: Use same seed for reproducible tests
- Performance consideration: Generate in batches for large datasets
- Edge case testing: Include boundary values in test data
- Data validation: Verify generated data meets requirements
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Password Generator
Generate secure passwords with customizable character sets and length.
Try our Password Generator →Frequently Asked Questions
Is the random data truly random?
Yes, our tool uses the browser's Web Crypto API which provides cryptographically secure random values suitable for security applications.
Can I generate the same random data twice?
No, true random generation means each run produces different results. For reproducible results, you would need a pseudo-random generator with seeds.
What's the maximum number of values I can generate?
You can generate up to 10,000 values at once. For larger datasets, we recommend generating in multiple batches to maintain browser performance.
Are generated UUIDs guaranteed to be unique?
UUID v4 has an extremely low probability of collision (1 in 2^122). For practical purposes, they are considered unique, but absolute uniqueness cannot be guaranteed.
Can I use this for cryptographic applications?
Yes, the randomness quality is suitable for most cryptographic applications including tokens, keys, and nonces. However, consult security experts for critical applications.
Is my generated data stored or logged?
No, all generation happens locally in your browser. Generated data is never sent to our servers or stored anywhere.
Professional Random Data Generation
Generation Features:
- • Cryptographically secure randomness
- • Multiple data type support
- • Bulk generation capabilities
- • Flexible export options
Perfect For:
- • Software developers and testers
- • Security engineers and architects
- • Database administrators
- • Game developers and data scientists