Random Number Generator
Generate cryptographically random numbers within any range. Supports integers, decimals, and bulk generation.
How It Works
Set your minimum and maximum values, choose whether to include decimals, and select how many numbers to generate (1–1000). Click Generate for truly random numbers using the browser's CSPRNG.
Random number generation is fundamental to security, simulations, games, and testing. Our generator uses the browser's cryptographically secure random number generator — the same one used for generating encryption keys.
**Why Use a Cryptographically Secure Generator?**
JavaScript's `Math.random()` is not cryptographically secure — its output is predictable if you know the seed. For any security-sensitive use case (generating tokens, lottery draws, unique IDs), you must use `crypto.getRandomValues()`, which is what our tool uses.
**Use Cases**
- **Security tokens**: Generate random codes for password resets, verification emails
- **Testing data**: Generate large sets of test numbers
- **Games and simulations**: Dice rolls, card draws, random selection
- **Statistics and research**: Monte Carlo simulations, random sampling
- **Lotteries**: Fair random selections from a range
- **Education**: Demonstrating probability and statistics
**Integer vs Decimal Mode**
Integer mode generates whole numbers within your specified range. Decimal mode generates floating-point numbers with up to 10 decimal places, useful for simulations requiring precise random values.
**Uniform Distribution**
All generated numbers are uniformly distributed — every value in the range has an equal probability of being selected. This is the gold standard for unbiased random generation.
**Bulk Generation**
Need to generate many random numbers at once? Use bulk mode to generate up to 1,000 numbers in a single click. Copy all numbers as a comma-separated list or download as a text file.
**Seed-Based Generation**
Some applications require reproducible random sequences (for debugging or testing). Enter a seed value to generate a deterministic sequence that can be reproduced. Note: seeded generation is NOT cryptographically secure.
**Privacy**
All generation happens in your browser. No data is sent to our servers.