Random Number Generator

This free random number generator picks unbiased numbers in any range, and does the things a one-number picker cannot: up to 1000 numbers in a single draw, no repeats for raffles, decimals to ten places, sorted output, and a timestamped record of the draw you can copy and publish with your result.

Minimum

Maximum

How many

Decimal places

Sort results

No repeats (each number appears once)

Set a range and press Generate.

What does this random number generator do?

It picks unbiased numbers in any range you set, and it does five things a plain one-number picker does not.

Up to 1000 numbers in a single draw, not one at a time.
No repeats, so a raffle or a prize draw never picks the same ticket twice.
Decimals to ten places, for a random value between 0 and 1, or a random price.
Sorted output, lowest to highest, highest to lowest, or left in the order they came out.
A draw record, a timestamped receipt of the range, the settings and the result, ready to copy and publish next to your announcement.

Search engines and most simple widgets answer one question only: give me a number between A and B. If that is all you need, any of them will do. The list above is for everything past that, and it is all free, with no sign-up and nothing leaving your browser.

How do I use it?

Set the range. Enter the smallest and largest numbers you want to allow. Negative numbers and ranges crossing zero are fine.

Choose how many. One number, or up to 1000 at once.

Set the options. Turn repeats off for a draw. Add decimal places if you need fractions. Pick a sort order if the list should come out in sequence.

Generate, then copy. Copy the numbers on their own, or copy the draw record if you need to show what the settings were.

The presets across the top jump straight to the common setups: a dice roll, a coin flip, six from forty-nine, ten raffle winners, and a decimal between 0 and 1.

How do I run a giveaway draw people will trust?

Use "no repeats", then copy the draw record and publish it with the result.

The record is a plain-text receipt that looks like this:

Drawn at:  2026-09-18 14:30:00 UTC
Range:     1 to 500
Picked:    10, no repeats, sorted ascending
Source:    Web Crypto (crypto.getRandomValues), unbiased
Result:    17, 58, 92, 140, 233, 287, 341, 399, 455, 488

Posting that alongside the winning numbers answers the questions entrants actually ask: how many entries were in the pool, how many winners were drawn, and whether anyone could win twice. A bare screenshot of a number answers none of them.

Be clear about what this is. It is a record, not cryptographic proof. This tool has no server, so it cannot issue a verification code that a third party could check independently. If your draw has real money on the line and needs verifiable evidence, use a service built for that. For a giveaway, a stated method with a timestamp is a large step up from a number with no context.

Is it actually random?

It is unbiased and cryptographically strong, which is the property that matters for a fair draw.

Two things are going on under the hood. First, the numbers come from the Web Crypto API (crypto.getRandomValues), the browser's cryptographically secure source, not the ordinary Math.random, which is fast but predictable and never intended for anything that has to be fair.

Second, it corrects modulo bias. If you take a raw random value and simply do value % range, the lowest numbers in your range come up slightly more often, because the range rarely divides evenly into the source. This generator discards and redraws the few values that would skew the result, so every number has exactly the same chance. Most simple generators skip this step and nobody notices, which is precisely the problem.

Worth being precise on the wording: this is a cryptographically secure pseudorandom generator, not a true random number generator. A true one draws from physical noise, like atmospheric static. For draws, games, sampling and picks the difference is not observable, but no browser can produce physical randomness and it would be dishonest to claim otherwise.

What are people using it for?

Giveaways and raffles: pick winners with no repeats, then publish the draw record.
Games: roll dice, flip a coin, pick a random move or a random starting player.
Teaching and testing: generate sample data, quiz numbers, or a random seed for an exercise.
Sampling: pull a random subset of rows, tickets or IDs to audit.
Decisions: let a number settle who goes first, who picks the restaurant, or who pays.

What this tool does not do

It does not improve your odds at anything. Each draw is independent of the last. The tool does not track which numbers came up before, does not avoid recent numbers, and has no memory between draws.
It does not predict anything. There is no pattern to find, and any tool claiming to forecast a lottery is selling you something.
It does not issue verifiable proof. The draw record is a receipt of your settings and results, not a code a third party can independently verify. That requires a server, and this tool has none.
It does not pick names. It works with numbers only. Number your entrants and draw the numbers.
It does not keep a history. Nothing is stored between draws or between sessions. Copy what you need before you generate again or close the tab.

Is my data private?

Yes. The generator is fully client-side. Nothing you set or generate is uploaded, logged, or stored, and it all clears when you close the tab. Because the numbers are created on your own device, nobody else can see them or predict them, and the tool keeps working offline once the page has loaded.

Frequently asked questions

How do I draw numbers with no repeats?

Tick the "no repeats" box and set how many you want. This is what a raffle or a prize draw needs, where the same ticket cannot win twice. The tool uses a partial Fisher-Yates shuffle, so every combination is equally likely and the draw stays instant even across a range of millions.

Can I generate many random numbers at once?

Yes, up to 1000 in a single draw. Set the range, type how many you need, and they all appear together with a copy button for the whole list. Leave repeats on for dice rolls, where a value can come up twice, or turn them off for a draw where each number must be unique.

Can it generate random decimals, not just whole numbers?

Yes. Set decimal places from one to ten and the generator works in that precision, so you can draw a random value between 0 and 1 to four decimals, or a price between 9.99 and 49.99 to two. Set decimal places to zero and it returns whole numbers only.

Can I sort the numbers it generates?

Yes. Choose draw order to keep the sequence the numbers came out in, or sort them lowest to highest or highest to lowest. Lottery-style draws are usually read in ascending order, while a raffle often wants the draw order preserved because the first name out takes the first prize.

How do I show a giveaway draw was fair?

Use the draw record button. It copies a timestamped receipt showing the exact range, how many were picked, whether repeats were allowed, the sort order and the results. Publish it with your announcement so entrants can see the settings you used rather than just the winning number.

Are these numbers really random?

They are cryptographically strong and unbiased, which is what fairness needs. The tool uses the Web Crypto API rather than the predictable Math.random, and it corrects modulo bias, a common flaw that quietly makes low numbers appear more often. Every value in your range has exactly the same chance.

What is the difference between this and a true random number generator?

A true generator draws from physical noise, like atmospheric static. This one is a cryptographically secure pseudorandom generator seeded by your operating system. For draws, games, sampling and picks the difference is not observable, but it is worth knowing that no browser can produce physical randomness.

What range of numbers can it handle?

Anything up to 9,007,199,254,740,991, which is the largest whole number JavaScript can represent exactly. Negative numbers and ranges crossing zero work too. If a range is too wide for the number of decimal places you asked for, the tool says so instead of quietly returning skewed results.

Can I use it to pick lottery numbers?

You can, and there is a six from forty-nine preset. Be clear about what it does though: the numbers are unbiased, but no generator improves your odds, because every draw is independent of the one before. It cannot predict anything and does not track which numbers have come up before.

Is anything I generate sent to a server?

No. Every number is generated locally in your browser and nothing is uploaded, logged, or stored. The range and results clear when you close the tab, and the tool keeps working offline once the page has loaded. That also means your results are private and cannot be seen by anyone else.