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Random Number Generator
Cryptographically random numbers in any range.
100% FreeRuns instantlyNo watermark
- 1Choose toolOpen the Vootkit workspace.
- 2Add inputProvide the content or settings.
- 3ProcessLet the browser do the work.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.
How to use Random Number Generator
Provide the content or settings.
02Let the browser do the work.
03Copy, download or continue.
04Your files stay private
Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.
Learn more about privacyThere are two kinds of random number, and using the wrong one is the difference between a fair raffle and a security incident.
What Random Number Generator does
Generates numbers in a range you set, one or many, with an option to make every result unique.
It uses the browser’s general-purpose generator — the right tool for draws, sampling, testing and games, and the wrong one for anything an attacker would want to guess.
Choosing the right generator
| This tool | Pseudorandom — deterministic algorithm, well distributed |
|---|---|
| Good for | Draws, teams, dice, test data, sampling, tie-breaks |
| Not for | Passwords, tokens, keys, session ids, anything secret |
| Range | Inclusive at both ends |
| Unique option | Requires the range to be at least as large as the count |
| Negative numbers | Allowed — the minimum can be below zero |
Detailed steps
- Set the minimum and maximum. Both ends are included.
- Choose how many numbers you want. Asking for several at once gives you a single draw rather than several separate ones.
- Turn on unique if you are drawing positions or lottery numbers rather than rolling a die repeatedly, since a die can and should repeat.
- For anything security-related, use the password generator instead — it draws from a cryptographic source.
Worth knowing
Pseudorandom means the sequence is produced by an algorithm from a starting value, and anyone who learns that value can reproduce every number that follows. For a raffle nobody cares. For a password reset token, a promo code or a session identifier, it is the whole attack — and the mistake is common enough that it has caused real breaches. If a number needs to be unguessable rather than merely unpredictable to you, it needs a cryptographic generator.
Frequently Asked Questions
What does pseudorandom actually mean?
The numbers come from a deterministic algorithm seeded with a starting value, rather than from physical noise. The output passes statistical tests for randomness, which is what matters for draws and simulations, but it is reproducible in principle — so it should never protect anything.
Can I use this to generate a password?
No. Use the password generator, which draws from the browser’s cryptographic source. The distinction sounds academic and is not: predictable generators used for tokens and reset codes have caused real, documented breaches, and the failure is invisible until somebody exploits it.
Are the minimum and maximum included?
Yes, both ends are in range, so 1 to 6 can produce a 1 and a 6 as you would expect from a die. Off-by-one at the boundary is a classic source of quiet bias in home-made randomisers, which is why it is worth stating rather than leaving you to test it.
Why can I not get unique numbers?
The range has to be at least as large as the count — you cannot draw ten unique numbers between 1 and 5, because there are only five to draw. Widen the range or reduce the count, or allow repeats if the picks are genuinely independent.
Is Random Number Generator free?
Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.
Are my files uploaded?
No. Random Number Generator runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.
Do I need to install anything?
No. Random Number Generator works in any modern browser on desktop, tablet or phone. Open the page and start.
How often can I use it? Is there a daily limit?
On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.
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This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.