Random & Fun
Draw random numbers, evenly
Pick a range and how many numbers you want. Repeats can be turned off for a raffle or a draw, and the distribution is even rather than merely unpredictable.
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Drawn with the browser's cryptographic random number generator, so the distribution is even rather than merely unpredictable.
- Runs in your browser
- No account required
- Free to use
How it works
Even, not just random
The usual shortcut for putting a random value into a range is the modulo operator, and it is biased: with a range that does not divide the generator’s output evenly, the low numbers come up more often. Values in the biased tail are discarded and redrawn, so every number in the range is equally likely.
Unique draws use a shuffle
Drawing without replacement by rejecting duplicates gets slow as the pool empties. The range is shuffled and the first few taken instead, which is fast and exactly uniform.
What it does
Any range, any count
Up to a thousand numbers at once, with negative ranges handled.
No-repeat mode
For raffles, draws and picking a random subset.
Refuses the impossible
Ten unique numbers from a range of five is not a draw, and the tool says so rather than looping.
Runs in your browser
No account and no upload — what you type is never sent anywhere. Analytics records that the tool was opened, never what you put into it.
Practical advice
Getting a better result
- For a raffle, turn on no-repeats and draw all the winners in one go — drawing one at a time and discarding duplicates by hand is where mistakes creep in.
- The generator is fair, not secret. Do not use it to generate anything that has to be unguessable — the password generator is for that.
Questions
Things people ask
Is this actually random?
It draws from your browser’s cryptographic random number generator, which is seeded from operating-system entropy. For any practical purpose — a draw, a game, a sample — it is random, and the distribution is even across the range.
Can I use it for a prize draw?
Yes. Turn off repeats and draw all the positions at once, which is both fair and auditable in the sense that everyone can see the same list. It is not a certified randomness source, so a regulated draw may need something else.
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Open toolWho builds these
Free tools by day. Websites that earn their keep by trade.
KuConvert is built by KUDUY, a web design and development agency. From custom WordPress builds to SEO and e-commerce, everything they do is engineered to bring you more qualified traffic and turn it into revenue.
Web Design
Custom, conversion-focused web design that captivates visitors and turns them into paying customers. Mobile-first, fast, and built to rank.
Web Development
Custom WordPress websites built with clean code, blazing-fast performance (Core Web Vitals optimised), and enterprise-grade security.
E-Commerce
Online stores that convert visitors to customers with seamless shopping experiences.
SEO
Technical SEO, keyword research, on-page optimisation and local SEO strategies that drive qualified organic traffic.
Digital Marketing
Data-driven campaigns that deliver measurable ROI across every channel.
Branding
Memorable brand identities that stand out in any market and build lasting trust.
Website Help
One-on-one expert support for bug fixes, updates and ongoing maintenance — without a long-term retainer.
Fixed scope, no surprise invoices
Most sites ship in four to eight weeks with the scope and the price agreed up front.
SEO from day one
Search is designed into the build — structure, schema and Core Web Vitals — not retrofitted.
A team, not a ticket queue
A project manager, a designer and a developer you can actually reach.
Need your whole site to load this fast?
Images are usually the heaviest thing on a page and the easiest win. KUDUY works on site speed, image delivery and Core Web Vitals for teams who would rather not do it by hand.
This tool runs entirely in your browser. Your files are never uploaded.