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繁體中文What Is an RNG?
A random number generator (RNG) is the software that produces unpredictable results in online casino games. This guide explains what it does and how its fairness is checked.
- A random number generator is software that produces unpredictable numbers, deciding each card, reel or dice result so outcomes cannot be predicted.
- A certified RNG produces results with no pattern or memory, tested by independent labs.
- RNG games are trusted through independent testing, while provably-fair crypto games let you verify each result yourself on a blockchain.
What an RNG is
An RNG is an algorithm that generates a continuous stream of unpredictable numbers. In a casino game, those numbers decide each card, reel position or dice roll, so no outcome can be predicted in advance.
Why each result is independent
A good RNG produces results with no pattern and no memory, so past outcomes never influence the next. This is why a slot is never 'due' a win — see how slots work.
How RNGs are tested
Independent labs test RNGs for true randomness and correct behaviour. A passing game is certified fair — see testing labs and eCOGRA.
RNG vs provably fair
Traditional games rely on a certified RNG you trust through testing; provably-fair crypto games let you verify each result yourself on a blockchain. Both aim at the same goal: fair outcomes.
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FAQ
A random number generator is software that produces unpredictable numbers, deciding each card, reel or dice result so outcomes cannot be predicted.
A certified RNG produces results with no pattern or memory, tested by independent labs. Past outcomes never influence the next result.
RNG games are trusted through independent testing, while provably-fair crypto games let you verify each result yourself on a blockchain.
Last updated: 2026-06-15