Random Number Generator
Generate random numbers in any range, with no repeats.
✓ Professional standard Applies standard mathematical formulas and conventions for accurate, verifiable results.
Random Number Generator is a free online calculator from Toolinza. Generate random numbers in any range, with no repeats. It runs entirely in your browser — your data is never uploaded — needs no signup, and works on any device. Toolinza offers 293+ free tools used by people across the UK, USA, Canada, Australia, the EU, India, Pakistan, the Middle East and worldwide.
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About the Random Number Generator
Sometimes you just need a fair, unbiased number — to pick a raffle winner, make a decision, run a game or sample data. Doing it in your head is not truly random, and that is exactly when a generator helps.
This Random Number Generator produces numbers in any range you set, and can guarantee no repeats, so it is genuinely fair for draws and selections.
How to use the Random Number Generator
- Set the minimum and maximum of your range.
- Choose how many numbers to generate.
- Decide whether to allow repeats.
- Generate your random numbers instantly.
Key features of the Random Number Generator
- Random numbers in any range
- Option for no repeats (unique draw)
- Generate one or many at once
- Fair and unbiased
- Private — runs in your browser
How the Random Number Generator works
Each calculator applies the standard mathematical formula for its task — whether that is percentages, areas and volumes, averages, ratios or date arithmetic — following conventional order of operations and calendar rules (including leap years where relevant). Calculations run in your browser and update instantly.
Tips & best practices
- Turn off repeats when you need unique winners, such as drawing several different prize numbers.
- Set the range to match your list — if you have 50 entries, generate between 1 and 50.
- For transparency in a public draw, generate live so everyone sees the result.
Standards & accuracy
Applies standard mathematical formulas and conventions for accurate, verifiable results.
Results follow standard mathematical conventions. For very large or high-precision scientific work, be mindful of normal floating-point rounding, as with any digital calculator.
Who uses the Random Number Generator?
- Picking raffle or giveaway winners
- Making an unbiased decision
- Games, quizzes and activities
- Random sampling and selection
Privacy & security
The Random Number Generator runs entirely inside your web browser. Your data — whether that is a file, figures or text — is processed on your own device and is never uploaded to a server, stored or shared. There is no signup and no account, so you can use it as often as you like while keeping full control of your information. This makes it a safe choice even for confidential and sensitive work.
Why choose Toolinza?
- 100% free — no hidden charges, watermarks or usage caps.
- Private & secure — your data stays on your device.
- Standards-compliant — accurate results suitable for the UK, USA, Canada, Australia, EU, India, Pakistan, the Middle East and worldwide.
- Works everywhere — desktop, tablet and mobile.
Frequently asked questions
Yes. Turn on the no-repeats option to produce unique numbers, which is ideal for fair draws where each result must be different.
Yes. Enter any minimum and maximum, and the generator picks numbers within that range.
It uses your browser's random function, which is unbiased and more than sufficient for draws, games and everyday random selection.
Yes. The Random Number Generator is completely free with no signup, no watermarks and no usage limits. Toolinza is supported by unobtrusive advertising so every tool stays free.
Absolutely. This tool runs entirely in your browser — your data and files are never uploaded to any server, so everything stays private on your own device.
No. The Random Number Generator works instantly in any modern web browser on desktop, tablet and mobile — Windows, macOS, Linux, Android and iOS.