Can I generate numbers without repeats?

Yes. Use integer mode, turn on No repeats, and make sure the range contains at least as many numbers as the count you request.

Are the minimum and maximum included?

For integers, yes. Decimal results are generated inside the range and then rounded for display.

How many results can I generate at once?

The tool caps each run at 1,000 results so the page stays responsive in the browser.

Is this cryptographically secure?

No. It uses Math.random, not Web Crypto. Use a security-focused generator for passwords, tokens, keys, or other sensitive values.

Random Number Generator

Generate random integers, decimals, list picks, coin flips, or d6 rolls with custom ranges, count controls, and no-repeat mode for integers and lists.

Minimum

Maximum

Count

No repeats

Generate random numbers in a range

Use this random number generator to create one result or a batch of results inside a custom minimum and maximum range. Integer mode includes both endpoints; decimal mode formats each value to the selected number of decimal places.

Choose integers for whole-number draws, raffles, classroom examples, and test data.
Choose decimals when you need values such as 0.25, 17.8, or 99.99.
Set the count to generate several values at once.
Turn on no repeats for unique integers or unique list picks.

No-repeat mode and limits

No-repeat mode is available for integers and list picks. If the requested count is larger than the available range or list, the tool returns the available unique values and shows a warning.

N_{unique} \leq min (N_{requested}, R)

N_unique is the returned unique count, N_requested is the requested count, and R is the integer range size or item count.

For decimals, uniqueness is not enforced because rounding can make independently generated values look identical.

Randomness source

The browser implementation uses Math.random, which is suitable for casual decisions, classroom probability examples, games, mock data, and non-official draws.

Do not use this generator for passwords, cryptographic keys, regulated gambling, official lotteries, cash prize drawings, or any process that needs an audit trail or certified randomness.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

Related Tools

Flip a Coin

Flip a virtual coin for heads or tails, run quick series of 5, 10, or 100 flips, and track live heads/tails statistics and recent history.

Open

Dice Roller

Roll virtual dice online: d4, d6, d8, d10, d12, d20, and d100 with 1-10 dice, a modifier, roll notation, totals, and recent history.

Open

Password Generator

Generate a strong random password in your browser with length, character set, strength estimate, and one-click copy.

Open

UUID Generator

Generate UUID v4 and GUID-style identifiers in bulk, with uppercase, no-dash, and brace formatting options.

Open