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Rotina Diária

Random Number Generator

Generate random numbers in any range, with or without repeats, using a cryptographic random number generator.

Click Draw.

Processed on your device. Nothing you type is sent anywhere.

How to use: Random Number Generator

  1. Enter a range (from… to…) and how many numbers you want to generate.
  2. Check No repeats to draw each number only once.
  3. Click Generate — your previous results appear just below.

About this tool

Numbers are generated with crypto.getRandomValues, your browser’s cryptographically secure random number generator, with bias correction. Every number in the range has exactly the same chance of being picked. It’s great for raffles, giveaways, and classroom activities.

For prize drawings with legal requirements, such as commercial promotions, local laws may require permits and specific procedures. Consider documenting the drawing with witnesses or a screen recording.

Frequently asked questions

Are the results truly random?

Yes. We use your browser’s cryptographic random number generator (the same kind used to create security keys), with rejection sampling to eliminate bias. No one, including us, can predict the results.

Do lottery presets improve my odds?

No. They only fill in the range and number of picks for the game. Every combination has the same odds of being drawn.

Is it really free? Is there a daily limit?

It's free with no daily limits. Processing happens on your device, so there's no per-use cost and no need to limit you.

Does it work on phones?

Yes. The site works in any modern browser on Android, iPhone, Windows, Mac, and Linux—no installation needed.

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