Free Random Number Generator Online

Pick a winner for the office raffle. Roll a virtual d20 for the D&D session. Sample 30 random row numbers from a 10,000-row spreadsheet for an audit. Generate seed values for a unit test. Most random number questions in everyday life have the same shape: "give me N numbers between A and B, with or without duplicates", and our free online Random Number Generator answers exactly that. Set the minimum and maximum (any integer or decimal range), the count (one number for a raffle, dozens for sampling), whether duplicates are allowed (off for raffles, on for dice rolls), and how many decimal places you want (zero for integers, more for simulations). Click Generate and the numbers appear as a list along with summary statistics (sum, average, smallest, largest) so you can spot-check the distribution. The randomness comes from the browser's `crypto.getRandomValues` Web Crypto API — the cryptographically secure source — which means the results are statistically uniform and unpredictable, not the predictable Math.random that many free tools rely on. That matters for fairness: a raffle drawn from `Math.random` on certain old browsers actually had detectable patterns. Real-world workflows: drawing a winner from a list of contest entrants (assign each entrant a number, then generate one random pick), sampling rows from a dataset for spot-checking, generating dice rolls for a tabletop game, picking a random restaurant from a numbered list when nobody can decide, or seeding a Monte Carlo simulation. After generating, the [Random String Generator](/tools/random-string-generator) handles random text, the [Random Token Generator](/tools/random-token) produces UUIDs, and the [Password Generator](/tools/password-generator) creates secure passwords using the same Web Crypto source.