About TheRandomNumber.com
TheRandomNumber.com is a free, browser-based random number generator built to do one thing well: give you a genuinely random result, instantly, without making you sign up for anything or sit through a slow, cluttered page.
The site covers six tools in one place:
Random Number Generator — any range you choose, from 1–10 to 1–1,000,000
Lottery Number Picker — Powerball, Mega Millions, EuroMillions, UK Lotto and Lotto NZ
Dice Roller — D4, D6, D8, D10, D12, D20 and D100, up to 20 dice at once
Coin Flip — heads or tails with session statistics
Random Name Picker — paste a list, pick one fairly
Multiple Numbers — generate a set of unique random numbers in any range
How the randomness works
Every result on this site is generated using window.crypto.getRandomValues(), the Web Cryptography API built into every modern browser. This API draws from the operating system's entropy pool — a mix of hardware timing events, CPU state and other signals that are genuinely difficult to predict — to produce numbers that are cryptographically unpredictable.
This is meaningfully different from the randomness most online tools use. JavaScript's built-in Math.random() is a seeded algorithm — it produces sequences that look random but are technically reproducible if you know the starting seed. The cryptographic API we use has no such weakness. For lottery picks, game rolls, giveaway draws and everyday use, the results are effectively indistinguishable from true randomness.
Everything runs entirely in your browser. No numbers are sent to any server. Nothing is stored between sessions. The names you enter in the Name Picker, the ranges you configure and the results generated all stay on your device.
Why we built it
Most random number generator sites are slow, ad-heavy and require more clicks than the task warrants. We wanted something that felt like a proper tool rather than an afterthought — fast to load, easy to use on a phone, and honest about how the randomness works. The result is a site with no accounts, no tracking cookies and no unnecessary dependencies.
We also wanted the randomness to be credible. Using window.crypto.getRandomValues() rather than Math.random() is a deliberate choice, not a technicality — it means the results hold up to scrutiny whether you are running a public giveaway, playing a game or making a decision you want to feel genuinely fair.
Who we are
TheRandomNumber.com is built and maintained by Rose Venture Labs, a New Zealand-based venture builder focused on creating well-crafted, genuinely useful digital tools. We build things we would want to use ourselves — simple, fast and honest about what they do.
The site is free because it costs very little to run. A small number of ads help cover hosting and maintenance costs. There are no premium tiers, no upsells and no accounts. If you have feedback, a bug to report or a feature suggestion, we would genuinely like to hear from you via the contact page.
Using this site
There are no restrictions on how you use the tools here. Teachers use the Name Picker for classroom draws. Developers use the number generator for test data. Tabletop RPG players use the Dice Roller when they don't have physical dice available. Lottery players use the Lottery tab for quick picks. Competition organisers use the Name Picker to draw winners fairly and document the process. Whatever you need a random result for, the tools are here and free to use.