Random Number Generator
Generate random numbers instantly — free, no sign-up required.
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What is a random number generator?
A random number generator (RNG) is a tool that produces numbers with no discernible pattern or predictability. Random numbers are used for everything from workplace raffles and board games to classroom decisions, statistical sampling, and social media giveaways.
There are two main types of generator:
- True random number generators (TRNG): these use unpredictable physical phenomena — atmospheric noise, radioactive decay — as a source of entropy. The output is fundamentally unpredictable.
- Pseudorandom number generators (PRNG): these use mathematical algorithms seeded with an initial value. Fast and sufficient for the vast majority of everyday uses, but theoretically reproducible if the seed is known.
Our tool uses your browser's crypto.getRandomValues() API — the same cryptographically secure source used for data encryption and TLS. Results are fully trustworthy for prize draws, games, sampling, and any situation demanding genuine impartiality. All computation happens client-side: your numbers never leave your device.
How to use the random number generator
The tool is designed to be instant and friction-free:
- Set the range: enter your desired minimum and maximum. By default the generator draws a number between 1 and 100.
- Choose the quantity: need just one number, or several at once? Enter how many in the Quantity field.
- Allow or disallow duplicates: for a draw where each entry can only win once, untick Allow duplicates.
- Click Generate: your number appears instantly — no loading screens, no waiting.
- Copy or regenerate: copy the result to your clipboard with one click, or hit Generate Again for a fresh draw.
The other tabs offer a dice roller (D4 to D20), coin flip, and a list tool for shuffling or picking random winners from a custom list.
What can you use a random number generator for?
Gibraltar's compact, tight-knit community means random number generators are especially useful for organising fair draws in a small population where everyone knows each other.
Workplace and club raffles
With Gibraltar's close-knit professional community, workplace raffles and club draws need to be demonstrably fair. The List tab lets you paste in all participants' names, pick winners with one click, and share the result instantly as proof of an impartial draw.
School and community events
Gibraltar's schools and community associations run regular fundraising raffles and tombolas. Use the number generator to draw winning ticket numbers, or the List tab to fairly select prize winners at fêtes and community events.
Social media giveaways
Instagram and WhatsApp giveaways are popular among Gibraltar's active social media community. Paste entrant names into the List tab, generate winners instantly, and share the screenshot as transparent proof.
Tabletop RPGs and board games
No dice nearby? The Dice tab covers D4, D6, D8, D10, D12 and D20 — the full set for Dungeons & Dragons, Pathfinder, or any board game. Roll up to six dice simultaneously with the total calculated automatically.
Decision making
Can't decide between two options? The Coin tab gives an instant heads-or-tails flip. The Number tab with Min 1 and Max however-many-choices works perfectly for picking between multiple options.


