Random.org – Website that Produces “True” Random Numbers

Random.org is a website that produces “true” random numbers based on atmospheric noise. In addition to generating random numbers, it has free tools to do things such as flip coins, shuffle cards, and roll dice. It also offers paid services to generate sequences of random numbers and act as a third-party arbiter for raffles, sweepstakes, and promotions.

Random numbers are generated based on atmospheric noise captured by several radios tuned between stations. People use RANDOM.ORG for holding drawings, lotteries and sweepstakes, to drive games and gambling sites, for scientific applications and for art and music.

FREE services

Games and Gambling

  • Lottery Quick Pick is perhaps the Internet’s most popular with 146 lotteries
  • Keno Quick Pick for the popular game played at many casinos
  • Coin Flipper will give you heads or tails in many currencies
  • Dice Roller does exactly what it says on the tin
  • Playing Card Shuffler will draw cards from multiple shuffled decks
  • Birdie Fund Generator will create birdie holes for golf courses


  • Integer Generator makes random numbers in configurable intervals
  • Sequence Generator will randomize an integer sequence of your choice
  • Integer Set Generator makes sets of non-repeating integers
  • Gaussian Generator makes random numbers to fit a normal distribution
  • Decimal Fraction Generator makes numbers in the [0,1] range with configurable decimal places
  • Raw Random Bytes are useful for many cryptographic purposes

Lists and Strings and Maps

  • List Randomizer will randomize a list of anything you have (names, phone numbers, etc.)
  • String Generator makes random alphanumeric strings
  • Password Generator makes secure passwords for your Wi-Fi or that extra Gmail account
  • iGoogle Password Generator is a handy tool for your iGoogle desktop
  • Clock Time Generator will pick random times of the day
  • Calendar Date Generator will pick random days across nearly three and a half millennia
  • [advt]Geographic Coordinate Generator will pick a random spot on our planet’s surface
  • Bitmaps in black and white
  • Pregenerated Files contain large amounts of downloadable random bits
  • Pure White Audio Noise for composition or just to test your audio equipment
  • Jazz Scales to practice improvisation for students of jazz guitar
  • Samuel Beckett’s randomly generated short prose

Web Tools and Widgets for Your Pages

  • Integer Widget Wizard will put a mini-RANDOM.ORG on your web page or blog
  • Draw Widget Wizard will put the result of a paid drawing on your web page or blog
  • HTTP API to get true random numbers into your own code
  • Guidelines describe how to avoid getting in trouble
  • Banned Hosts lists who didn’t behave and have been blocked


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