In online casino games, everything comes down to chance. But can you really trust that the outcomes are fair?
As a player, it’s normal to wonder if the games are rigged or if you actually stand a chance.
That’s where RNGs, Random Number Generators, come in. They’re the tech behind every digital spin, draw, and shuffle.
Let’s break down how RNGs work, whether they’re safe, and what you should know before betting real money.
What Is RNG in Online Casinos?
RNG stands for Random Number Generator. It’s a program that creates unpredictable outcomes to keep games fair.
Every time you spin a slot, draw a card, or roll digital dice, the RNG picks a random number in a split second.
That number is matched with a game result, like a symbol on a reel or a card from a deck.
How Does RNG Work?
Most RNGs start with a “seed” number, often based on the current time or user interaction. That seed goes through a math-heavy process to spit out random results.
Here’s an example:
In a 5-reel slot with 6 symbols on each reel, the RNG picks one value (1–6) per reel.
Your result comes from whatever combination the RNG generates.
In card games like baccarat, software might use the Mersenne Twister and Fisher-Yates shuffle to randomize the deck.
But RNGs don’t apply to live dealer games. Those use real cards, real wheels, and real dealers.
The randomness comes from physical actions, not software.
Can Online Casinos Rig the RNG?
Licensed online casinos cannot manipulate RNGs, at least not if they’re regulated. Here’s why:
- Independent companies like eCOGRA, GLI, and iTech Labs test RNGs regularly.
- These audits check for fairness, randomness, and compliance with gambling laws.
- Certified RNGs are locked down with anti-tamper protocols.
Casinos that try to interfere risk losing their licenses or getting shut down altogether.
Always check if a casino displays its RNG certification and who tested it.
RNG vs RTP: What’s the Difference?
It’s easy to mix up RNG and RTP, but they serve different purposes:
- RNG decides each game outcome. It makes sure every spin or play is random.
- RTP (Return to Player) is the expected payout percentage over time. For example, a slot with 96% RTP means it’s expected to return $96 for every $100 played over millions of spins.
Why RNG Certification Matters
Trust in online gaming comes down to proof. That’s what RNG certification delivers. Third-party testers like:
- eCOGRA
- iTech Labs
- Gaming Laboratories International (GLI)
…use statistical analysis and expert reviews to test game fairness. If a casino passes, they get certified.
A certified RNG builds trust between players and casinos. It shows that the game can’t be rigged, even if you’re losing.
These organizations test for:
- True randomness
- Absence of patterns or bias
- Compliance with gambling laws
How to Check If a Casino Uses a Certified RNG
Avoid shady casinos that don’t disclose how their games work. Look for signs of a legit RNG system before you sign up or deposit money. Here’s how to check:
- Scroll to the website’s footer – Look for badges from eCOGRA, GLI, or similar bodies.
- Read the casino’s About or Fair Play pages – They often explain how their games work.
- Check licensing – Trustworthy casinos are regulated by bodies like the UKGC or MGA.
- Use trusted review sites – Look for reviews that mention fair play and certification.
Are RNGs Used in All Casino Games?
No. Live dealer games are the exception. In live casino games like blackjack or roulette:
- A real dealer shuffles cards or spins the wheel.
- The outcome depends on physical movement, not algorithms.
But in virtual games like online slots or video poker, RNGs run the show.
Some hybrid games may blend live elements with RNG-driven features, so always check the game info.
Final Thoughts
So, Can You Trust RNGs? Yes, you can trust RNGs, as long as you’re playing at regulated, licensed casinos.
RNGs keep games fair by generating random results every time you play.
They’re tested and certified by trusted third-party labs to prevent tampering or bias.
That said, remember that RNGs don’t mean guaranteed wins. They only ensure fairness.
So when you spin the reels or place a bet, you’re always playing against luck, just as it should be.