# Randomnumbers.co

> Free random number generator with dice, coin flip, name picker, lottery and UUID tools. Secure, instant, no sign-in, no tracking: your numbers never leave your device.

A random number generator picks a number so that every number in your range is equally likely and the result cannot be predicted. Set a minimum and a maximum, press Generate, and this tool returns a number from your device’s secure random engine in a blink. Nothing is uploaded or stored.

Key facts:
- Free. No sign-in, no accounts, no passwords, no database.
- Numbers are generated in the visitor's browser with crypto.getRandomValues (a cryptographically secure pseudo-random generator) and an unbiased rejection-sampling method. They are never sent anywhere.
- Works offline after the first visit. Content last reviewed 2026-10-18.
- It is not a true (physical) random number generator; for certified physical randomness a service such as RANDOM.ORG is appropriate.

## Tools
- [Random Number Generator](https://randomnumbers.co/): Any range, decimals, no repeats, up to 1,000 digits.
- [Online Dice Roller](https://randomnumbers.co/dice-roller): d4 to d100, many dice, modifiers, advantage.
- [Coin Flip: Heads or Tails?](https://randomnumbers.co/coin-flip): Heads or tails, or flip up to 10,000 coins.
- [Random Name Picker (with Spinning Wheel)](https://randomnumbers.co/random-name-picker): Spin a wheel, pick winners, split into teams.
- [Lottery Number Generator](https://randomnumbers.co/lottery-number-generator): Quick-pick tickets for Powerball, Mega Millions and more.
- [Random String Generator](https://randomnumbers.co/random-string-generator): Secure random tokens, hex keys and IDs with entropy shown.
- [UUID Generator (v4 & v7)](https://randomnumbers.co/uuid-generator): Bulk UUID v4 and time-sortable v7, entirely in your browser.

## Guides, popular ranges and policies
- [Random Number Between 1 and 10](https://randomnumbers.co/random-number-between-1-and-10)
- [Random Number Between 1 and 20](https://randomnumbers.co/random-number-between-1-and-20)
- [Random Number Between 1 and 50](https://randomnumbers.co/random-number-between-1-and-50)
- [Random Number Between 1 and 100](https://randomnumbers.co/random-number-between-1-and-100)
- [Random Number Between 1 and 1,000](https://randomnumbers.co/random-number-between-1-and-1000)
- [Random Number Between 1 and 1,000,000](https://randomnumbers.co/random-number-between-1-and-1000000)
- [Random 4-Digit Number Generator](https://randomnumbers.co/random-4-digit-number)
- [Random 6-Digit Number Generator](https://randomnumbers.co/random-6-digit-number)
- [Random 10-Digit Number Generator](https://randomnumbers.co/random-10-digit-number)
- [How our random number generator works](https://randomnumbers.co/how-it-works)
- [Privacy, explained simply](https://randomnumbers.co/privacy)