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True Random Number Service

What's this fuss about true randomness?

Perhaps you have wondered how predictable machines like computers can generate randomness. In reality, most random numbers used in computer programs are pseudo-random, which means they are generated in a predictable fashion using a mathematical formula. This is fine for many purposes, but it may not be random in the way you expect if you're used to dice rolls and lottery drawings.

RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs. People use RANDOM.ORG for holding drawings, lotteries and sweepstakes, to drive online games, for scientific applications and for art and music. The service has existed since 1998 and was built by Prof. Mads Haahr of the School of Computer Science and Statistics at Trinity College, Dublin in Ireland. Today, RANDOM.ORG is operated by Randomness and Integrity Services Ltd.

FREE services

Games and Lotteries

Lottery Quick Pick is perhaps the Internet's most popular with over 280 lotteries

Keno Quick Pick for the popular game played in many countries

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

PAID service

Random Drawings

Q3.1 in the FAQ explains how to pick a winner for your giveaway for FREE

Third-Party Draw Service is the premier solution to holding random drawings online

Step by Step Guide explains how to hold a drawing with the Third-Party Draw Service

Step by Step Video shows how to hold a drawing with the Third-Party Draw Service

Price Calculator tells exactly how much your drawing will cost

Drawing FAQ answers common questions about holding drawings

Public Records shows all completed drawings going back five years

Drawing Result Widget can be used to publish your winners on your web page

Multi-Round Giveaway Service for verified video giveaways

FREE services

Numbers

Integer Generator makes random numbers in configurable intervals

Sequence Generator will randomize an integer sequence of your choice

True Random Number
Generator
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