You don't trust your casino. Good — use our Provably Fair Verifier. No opinions, no gut feelings. Paste your seeds, run up to 100,000 rounds through 19 NIST SP 800-22 statistical tests, and get a verdict you can share. Dice, Crash, Limbo, Coin Flip, Roulette.
What "RNG Tests Passed" means: we analysed the casino's provably-fair data stream and it passed our statistical fairness tests (NIST SP 800-22 and custom gaming tests). This concerns the randomness of the tested game rounds only — it is not a statement about the operator's business practices, solvency, withdrawals, or licensing. A fair RNG does not make a trustworthy casino. See each casino's report for scope and any operator warnings.
There are hundreds of crypto casinos. They all claim fairness. But who verifies? We asked the obvious questions.
I spent 23 years in the pit — from dealing cards in the Caribbean to managing floors in Europe. I've watched millions of hands. I've caught every trick in the book. Now I verify fairness with code, and the math doesn't negotiate.
The Ex-Pit Boss — Founder, FairPlay Audit
The source-available Community Edition (BSL 1.1) runs 8 core tests. Our full audit pipeline runs all 15 NIST SP 800-22 tests plus 4 additional statistical tests — 19 core tests per game, plus game-specific validation. The remaining 11 tests are available to qualified researchers under appropriate security terms.
We don't ask you to believe us. We give you the data and the tools to verify everything yourself.
Server seeds, client seeds, nonces — from actual casino rounds. No simulations. No synthetic data. Real gameplay, real stakes.
HMAC-SHA256 verification of every outcome. 19 statistical tests per game — the complete NIST SP 800-22 battery plus 4 additional tests. All at 99% confidence (α = 0.01). See all tests explained →
The full report, the raw dataset (CSV/JSON), the SHA-256 integrity hash, and a PGP signature. Download it. Fork our code. Reproduce our results. We hide nothing.
| Other casino sites | FairPlay Audit |
|---|---|
| "We played for 2 hours" | 100,000,000 verified rounds |
| "Feels fair to us" | 19 statistical tests, 99% confidence |
| "Trust our rating" | Download raw data yourself |
| Closed methodology | Open source on GitLab |
| Anonymous reviewers | 23-year casino veteran, real name |
| Paid placements | We audit first, talk business after |
An independent audit by a former pit boss. Published methodology. Downloadable raw data. No other affiliate on earth offers this.
We don't wait for an invitation. We test your RNG with millions of rounds and publish the results — with or without your cooperation. Fair casinos welcome this.
Pass the audit, earn the badge. Display it on your platform with a link to your published report. Your players get third-party verification. You get credibility no marketing budget can buy.
Fair today doesn't mean fair forever. The badge expires. Re-audit annually to maintain certification. Your competitors can't fake this.
Upload your game history. We'll run every round through our audit engine and give you a straight answer. No hedging. No "probably."
Download your game history (CSV or JSON) from any Provably Fair casino. Server seed, client seed, nonce — that's all we need.
Up to 100,000+ rounds through every NIST test. Same methodology we use for casino-wide audits. No shortcuts.
A clear verdict: FAIR or NOT FAIR. Every test result, every p-value, every chart. PDF with SHA-256 hash for authenticity. Free for VIP players.
Every audit is public. Every dataset downloadable. Every result reproducible.
100,000,000 rounds tested. 15/15 NIST SP 800-22 suite. 8/9 game tests PASS.
Why 9.7 and not 10? At 100M rounds, even a 0.005% deviation becomes statistically visible — a rounding artifact in the crash formula, not manipulation. In real money: ~5 cents difference per $1,000 wagered. Smaller samples would never catch this. The deeper we test, the more we find — and that's the point.
10.0/101,256,494 Crash rounds tested. 108 tests passed (NIST + PractRand). EXCELLENT.
9.8/102,300,000 rounds tested across 5 games. EXCELLENT.
Why 9.8? Dice, Limbo, Coin Flip and Roulette scored perfect. On Crash (Blast), 2 tests flagged a measured house edge slightly above the stated value — context, not manipulation. Full breakdown in the report.
10.0/10250,000 rounds tested across 5 games. 15/15 NIST tests passed. EXCELLENT.
10.0/1050,000 Crash rounds tested. 15/15 NIST tests passed. EXCELLENT.
10.0/1050,000 CoinFlip rounds tested. 15/15 NIST tests passed. EXCELLENT.
Every audit report details the exact statistical tests applied, all parameters used, and the mathematical reasoning behind each result. We publish raw data samples with every audit so results can be independently verified.
Sample sizes, significance levels, test selection criteria, and rejection thresholds — all documented in every report. No black boxes.
Every audit includes SHA-256 hashed datasets in CSV/JSON. Download them. Run your own analysis. Our results are reproducible by design.
Casino operators, cryptographers, and independent researchers are welcome to formally review our full methodology. We don't hide behind NDAs or paywalls.
Every provably fair casino lets you check if a game was honest. Here's how — step by step.
BC.Game: Click your avatar (top right) → Security Center → Provably Fair. You'll see your active Server Seed Hash, Client Seed, and Nonce. To reveal a past Server Seed, click "Change Seed" — the old one becomes visible.
Copy each field one at a time and paste it into our verifier. On mobile: long-press the value → Copy. Most casinos also have a small copy icon next to each field.
Tip: Copy them into a notes app first if you're switching between apps on your phone. Our Mobile Seed Guide walks you through it step by step.
Go to our Free Verifier Tool, paste your seeds, and hit Verify. The tool recalculates the game result using the same math the casino used.
The questions players and operators ask us most — with straight answers.
FairPlay Audit is the first independent, third-party auditor of provably-fair crypto casinos. It statistically tests each game over 250,000+ real rounds using the NIST SP 800-22 methodology and publishes the raw data and results openly. The methodology is open source.
No. Provably fair lets you cryptographically verify that a single bet’s outcome was not altered after you placed it. It does not prove that the random number generator is unbiased across thousands of rounds. Detecting a skewed RNG requires statistical testing of many outcomes — which is exactly what an independent audit adds on top of provably-fair verification. Read the full explainer.
In three steps, with zero trust required: (1) collect real player seeds and outcomes from the casino, (2) run the math — 250,000+ rounds per game through the NIST SP 800-22 statistical test suite, (3) publish everything, including the raw data and test parameters, so anyone can reproduce the result. See our full methodology.
Yes. FairPlay Audit provides a free Community Edition verifier: export your seeds from the casino, paste them in, and get a result. The open-source GitLab tool runs 8 tests; the full professional audit suite runs 19+.
Casinos that pass the full independent audit can display the RNG Certified badge as proof of fairness for their players. Certification requires annual re-certification to stay valid.
FairPlay Audit was built by a 23-year casino-industry veteran. It operates independently of the casinos it tests — it audits first and asks permission never — and its testing methodology is open source and open to formal review. More on the About page and our independence disclosure.
We've tested it. We've published it. Now you can verify it yourself. Every round, every test, every byte.
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