Whether you need to run a fair lucky draw, pick a random winner from a list, simulate dice rolls, generate lottery numbers, or create random test data — a true random number generator is the fair and unbiased solution. Our free browser-based generator uses cryptographic randomness to ensure every number is genuinely unpredictable.
True Random vs Pseudo-Random — What is the Difference?
Pseudo-random numbers are generated by mathematical algorithms. They look random but follow a deterministic pattern — if you know the starting seed, you can predict all future numbers. Most programming functions like Math.random() are pseudo-random.
True random numbers are generated from genuinely unpredictable physical processes. Our generator uses the browser Web Crypto API which generates cryptographically secure random numbers suitable for security applications, fair draws, and statistical sampling.
How to Generate Random Numbers Online
- Open the free random number generator
- Set your minimum number (default: 1)
- Set your maximum number (default: 100)
- Choose how many numbers to generate (1 to 1,000)
- Select whether duplicates are allowed
- Click Generate — numbers appear instantly
- Click Copy to use them anywhere
Common Use Cases for Random Number Generators
| Use Case | Setting | Example |
|---|---|---|
| Lucky draw winner | Min: 1, Max: participants count | Pick winner from 250 entries |
| Dice roll (6-sided) | Min: 1, Max: 6 | Board games, Ludo, Snakes & Ladders |
| Lottery numbers | Min: 1, Max: 49, Count: 6 | Pick 6 lottery numbers |
| Random student selector | Min: 1, Max: class strength | Pick students for presentations |
| Password seed | Min: 1000, Max: 9999 | 4-digit PIN generation |
| Test data generation | Any range | Create test datasets |
How to Run a Fair Lucky Draw or Contest
- Number all entries sequentially — Entry 1, Entry 2, Entry 3...
- Set min = 1, max = total number of entries
- Generate 1 random number (or more for multiple winners)
- The entry with that number wins
- Generate again for additional prizes (exclude previous winners)
For social media contests where you need to pick from comments, number the comments in order and use this method. Take a screenshot of the generated number for proof of fairness.
Dice Rolling and Coin Flip Simulation
Our random number generator doubles as a dice simulator and coin flipper:
- Standard dice (d6) — Min: 1, Max: 6
- Two dice total — Generate 2 numbers, add them together
- D20 (role-playing games) — Min: 1, Max: 20
- Coin flip — Min: 0, Max: 1 (0 = heads, 1 = tails)
- D100 percentile dice — Min: 1, Max: 100
Using Random Numbers for Statistics and Sampling
In statistics, random sampling means every member of a population has an equal chance of being selected. This is the foundation of unbiased research, surveys, and experiments.
To randomly sample 50 people from a database of 500: number all records 1 to 500, generate 50 unique random numbers between 1 and 500 (no duplicates), and select those records. This gives you a statistically valid random sample.
Pair with our percentage calculator to analyze your sample results and express findings as percentages.