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🇬🇧 Thunderball · free · cryptographically fair

Thunderball number generator

Pull truly random Thunderball lines in one tap — 5 numbers from 1–39 plus a Thunderball from 1–14. Generate up to 10 lines, copy any with a tap. Runs entirely in your browser; nothing is sent to a server.

5 / 39 + 1 / 14
Game format
1 in 8,060,598
Jackpot odds
£1
Per line
Tue·Wed·Fri·Sat
Draws, ~8pm UK

Generate your numbers

Every line uses crypto.getRandomValues with rejection sampling, so each number is exactly equally likely — no bias, no shortcuts.

Lines
1
💡 The fixed-jackpot one: Thunderball’s top prize is a flat £500,000 — it never rolls over, and every jackpot winner is paid the full amount rather than splitting it. The Thunderball is drawn from a separate 1–14 set, so it can match one of your main numbers.
Why this generator

Fair by maths, private by design

Many online pickers lean on Math.random(), which isn't built to be unpredictable. Ours uses your device's cryptographically-secure randomness — the same class trusted for encryption keys — and we use rejection sampling so no number is quietly favoured over another. Your picks are made on your device and never transmitted anywhere.

Worth saying plainly: a generator can’t predict a draw or improve your odds. Every Thunderball combination always has exactly the same chance — 1 in 8,060,598. What it gives you is a clean, unbiased, genuinely random line.

🔐 Want provably-fair numbers? Members unlock the SHA-256 entropy edition across every game — you seed the draw yourself by moving your mouse, and each line comes with a verifiable hash receipt.
See membership →
Lottery odds compared 📊 All generators ✨
FAQ

Questions, answered

How does the Thunderball generator work?
It picks 5 unique numbers from 1 to 39 and one Thunderball from 1 to 14 using your device’s cryptographically-secure random generator with rejection sampling, so every number is equally likely. Generate multiple lines and copy each with one tap.
What is Thunderball and how much is a ticket?
Thunderball, run by Allwyn for the UK National Lottery, is 5 numbers from 1–39 plus a Thunderball from 1–14, at £1 per line. Draws are Tuesday, Wednesday, Friday & Saturday at about 8pm UK time. The top prize is a fixed £500,000 and jackpot odds are 1 in 8,060,598.
Why is the jackpot fixed?
Thunderball never rolls over — the top prize is always £500,000, and unusually every jackpot winner receives the full £500,000 rather than sharing it. All tiers are fixed amounts, and you can win £3 just for matching the Thunderball alone.
Can a generator improve my chances of winning?
No. Thunderball is a game of pure chance and every combination always has exactly the same probability. A generator simply gives you a fair, unbiased random line.
Are my generated numbers private?
Yes. The generator runs entirely in your browser. Your numbers are never sent to a server and no sign-up is required.

Play for fun, play responsibly

Thunderball is a game of pure chance, run by Allwyn for the UK National Lottery. This generator produces random combinations only — it does not predict draws or improve your odds, and every combination is equally likely. Numbers are for entertainment; only the official operator confirms a result or prize. UK National Lottery winnings are paid tax-free.

Play responsibly and only spend what you can afford to lose. You must be 18+ to play. Support: GamCare or BeGambleAware (0808 8020 133).
How does Thunderball stack up?
Thunderball’s real winning odds & statistics → Compare Thunderball with the world’s 18 biggest →