Random Number Generator
📦 Random Number Generator Source Code $4.99
Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, works offline, and 100% client‑side. Generates random numbers with full customization: min/max range, count, decimal places, allow duplicates, sorting, and crypto‑secure random generation. Perfect for lotteries, simulations, gaming, and statistical sampling. One‑time purchase, lifetime access.
What Is a Random Number Generator?
A random number generator (RNG) produces a sequence of numbers that cannot be reasonably predicted better than by random chance. This tool uses the Web Crypto API's crypto.getRandomValues() — a cryptographically secure pseudorandom number generator (CSPRNG) built into modern browsers. You can customize the range (min/max), the number of values generated, decimal places, allow duplicates, and sort the results. It's ideal for simulations, lotteries, random sampling, gaming, and any application requiring unbiased randomness.
How to Use
- Set the range — enter the minimum and maximum values. Use the preset buttons for quick ranges.
- Choose the number of values — how many random numbers you need.
- Specify decimal places — 0 for integers, or up to 10 decimal places for floating‑point numbers.
- Toggle options — allow duplicates (or force unique values), and sort ascending or descending.
- Click "Generate" — view the results, with summary stats below. Copy the numbers with the Copy button.
Frequently Asked Questions
Is the random number generation truly random?
Yes. The tool uses the Web Crypto API's crypto.getRandomValues(), which is a cryptographically secure random number generator (CSPRNG) suitable for security‑sensitive applications. This is significantly more random than the standard Math.random().
Does this tool work offline?
Yes. Once the page loads, all generation happens locally in your browser using the built‑in crypto API. No network requests are made.
What happens if I uncheck "Allow duplicates"?
When duplicates are not allowed, the tool will generate a set of unique numbers within the range. If the requested count exceeds the number of unique values available in the range, the tool will generate as many unique numbers as possible and show a warning.
Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged. Generated numbers are for informational and entertainment purposes only.