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How to Check RNG Fairness in Online Casino Games

December 17, 2025 author Ross Young
How to Check RNG Fairness in Online Casino Games

Key Takeaways

  • RNGs are algorithms that determine the outcome of online slots and table games.
  • RNG software is independently audited by third parties like eCOGRA for transparency.
  • You can confirm RNG fairness by looking for certification & playing at licensed casinos.
  • Play thousands of legitimate & certified RNG casino games today at JeffBet.

Random number generator (RNG) software is responsible for the outcomes in most casino games. It creates thousands of numbers per second, which correlate to outcomes within the game.

For transparency, this software is independently tested and audited by companies like eCOGRA or iTech Labs, providing players with peace of mind as they spin the reels or take their seats at virtual tables.

Here, we explain how you can check RNG fairness in online casino games and reveal why you can be confident that the games you play at JeffBet offer a fair chance of winning.

How Do Random Number Generators (RNGs) Work?

RNG software is the technology that ensures casino games deliver fair, random outcomes. The software is built into slots and other casino games, running continuously in the background.

RNGs are built on complex algorithms and generate thousands of number combinations per second. Each generated number, using a seed value, corresponds to a specific outcome within the game. There are three main components to the software:

  1. Seed generation: The algorithm starts with a seed, which is a number derived from a specific dataset.
  2. Number generation: The algorithm then processes the seed through mathematical systems to produce sequences of random numbers, often at a rate of thousands of numbers per second.
  3. Re-seeding: The RNG algorithm can be periodically re-seeded over time to maintain randomness and prevent predictability.

In slots, for instance, the numbers correlate with symbol combinations on the reels. When the reels spin, if the RNG-generated outcome results in matching symbols, the player will receive a payout based on the game’s paytable.

This is what makes slot games and other RNG casino games, such as roulette online and video poker, truly random. You can win or lose every time you play, and there’s no way of influencing the outcome.

Reputable game providers, such as those that provide the casino games at JeffBet, have their random number generator software independently audited and verified.

Companies like iTech Labs and eCOGRA run tests on the RNGs within slots and other games, ensuring that they are random and haven’t been tampered with in any way.

Steps for Ensuring the RNG Software is Fair

  • Look for certification: Legitimate studios have their games independently tested and audited by third parties like eCOGRA, receiving certification if their games pass these tests. The studio will publish this information on their website, so begin by visiting the developer’s website and checking which certifications and accreditations they hold.
  • Check for return to player (RTP) disclosure: Fair RNG systems match the game’s expected RTP. As such, reputable game studios openly publish the RTPs within their games, building player confidence. If a developer hides its RTPs or doesn’t publish them within the game descriptions, it’s a potential red flag.
  • Consider regulatory compliance: Casino game developers should be licensed by regulatory bodies such as the UK Gambling Commission and the Malta Gaming Authority. According to the terms of their licence, they should offer games that provide a fair chance of winning. You can check the studio’s website for details – if they’re unlicensed, it’s another red flag.

These steps will help you identify legitimate casino games that offer a fair chance of winning. We also encourage you to play demo versions of RNG casino games before playing for real money.

Though the demo gameplay might be slightly different from the real-money version, it gives you a good idea of what to expect when you place your bets.

How to Play Games with Fair RNGs at JeffBet

At JeffBet, you can play thousands of games powered by RNG software. We offer slots from studios such as Pragmatic Play, Hacksaw Gaming, and NetEnt, alongside RNG table games including roulette, blackjack, and baccarat.

Our partner studios have their games independently audited and have received certification from eCOGRA and other reputable third-party organisations. This means that, when you play RNG casino games at JeffBet, you have a fair chance of winning each time.

Also, we only partner with licensed and accredited game studios, and we operate under a UK Gambling Commission licence (#39335). Ultimately, when you play at JeffBet, you don’t need to worry about independently checking the fairness of our games, but you can do so if you wish.

When you’re ready to play RNG casino games at JeffBet, follow these steps:

  1. Visit our homepage and click the green Join Now button to register for an account.
  2. Check for our latest promotions (terms and conditions apply).
  3. With funds in your account, browse our RNG game offering and decide which to play.
  4. Click the tile, open the game, and check the rules and paytable before playing.
  5. Decide how much to wager and place your bets. Please gamble responsibly.

At JeffBet, we take responsible gambling seriously and encourage you to bet within your means. Please visit our Bet Smart Hub for tips and tools to help you gamble responsibly.

Conclusion

Though many people see craps as a complex game that’s difficult to play, the reality is that, with some patience and a basic understanding of craps terminology, you can play and win this game in no time.

Use this guide and our strategy tips to get started, and play Evolution’s live craps game today at JeffBet to enjoy this popular casino game.

FAQs

The easiest way to check the fairness of a casino game’s RNG is to look for certification from a third-party organisation like eCOGRA or iTech Labs. You’ll often find this information on the studio’s website.
Live dealer table games don’t use RNGs - the host or croupier deals cards or spins the wheel to determine the game’s outcome. However, some live casino game shows have elements powered by random number generator software.
Most online casino games have their outcomes determined by random number generator software. Slots, table games like roulette, blackjack, and baccarat, and video poker are all powered by RNG software.
RNG software is not influenced by house edge. That said, studios that have their RNGs tested and audited will publish the return to player, indicating the house edge within the slot or table game.
Ross Young

Ross Young

With over five years of professional experience, Ross specialises in producing detailed slot reviews, table game strategy guides, and sports betting predictions. He’s committed to offering accurate insight to help others gamble responsibly and bet within their means.