Is this truly random or pseudorandom?

This tool uses JavaScript's Math.random() which is a pseudorandom number generator. For games, draws, and sampling it is indistinguishable from true randomness and perfectly adequate.

Can I use this for a fair lottery or raffle?

Yes, for informal draws. Set your range, enable No duplicates, and generate winners. Each number has equal probability. For legally binding lotteries, use certified RNG services with audit trails.

Can I generate random decimal numbers?

This tool generates integers. For random decimals, use JavaScript's Math.random() directly in your browser console: Math.random() * (max - min) + min.

What is the maximum number of random numbers I can generate?

You can generate up to 1,000 numbers at once. With No duplicates enabled, count cannot exceed the size of the range.

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随机数生成器

Generate truly random numbers within any range. Useful for games, draws, passwords, and more.

Minimum

Maximum

How Many

Allow Duplicates

What is a Random Number Generator?

A random number generator (RNG) produces numbers within a specified range that are statistically unpredictable — meaning there is no discernible pattern that could allow someone to predict the next number. True randomness is surprisingly difficult to achieve computationally; most software RNGs are "pseudorandom" (deterministic algorithms that simulate randomness), while hardware RNGs use physical phenomena like thermal noise or radioactive decay for genuine randomness.

Random number generators are used in an enormous range of applications: lottery and raffle draws, board game dice rolls, classroom random student selection, statistical sampling and simulations, cryptographic key generation, video game level generation, A/B testing sample selection, and scientific research. Our tool generates numbers using JavaScript's built-in Math.random() function, suitable for games, draws, and sampling use cases where cryptographic security is not required.

How to Use the Random Number Generator

Set the Minimum and Maximum values of your desired range.
Enter How Many numbers to generate (up to 1,000).
Choose Allow Duplicates (Yes) or generate a set of unique numbers (No).
点击 Generate — results appear with statistics (min, max, sum, average). Click Copy to copy all numbers.

Why Use Our Random Number Generator?

100% 免费 — Generate unlimited random numbers.
无需注册 — Instant use without an account.
基于浏览器 — Client-side generation; no server calls.
Unique Number Mode — Guarantee no duplicates in your generated set — perfect for lottery draws.
Statistics — Automatically shows count, min, max, average, and sum of generated numbers.

常见问题解答

This tool uses JavaScript's Math.random() which is a pseudorandom number generator (PRNG). It produces numbers that appear random and pass basic statistical tests, but are generated by a deterministic algorithm seeded by the system time. For most use cases (games, draws, sampling) this is indistinguishable from true randomness and perfectly adequate.

Yes, for informal draws. Set the range to match your ticket numbers (e.g. 1–100), enable "No duplicates", and generate the required number of winners. Each number has an equal probability of being selected. For legally binding lotteries or large-scale competitions, use certified RNG services with audit trails for regulatory compliance.

This tool generates integers (whole numbers). If you need random decimals, you can use JavaScript's Math.random() directly in your browser console: Math.random() gives a decimal between 0 and 1. To get a decimal in a range, use: Math.random() * (max - min) + min.

You can generate up to 1,000 numbers at once. When "No duplicates" is selected, the count cannot exceed the size of the range (e.g. for range 1–10, you can generate at most 10 unique numbers). For most practical applications — classroom draws, team selections, sample sizes — 1,000 is more than sufficient.

要闻速览

✓ 100% 免费，无隐藏费用
✓ 无需帐户或登录
✓ 适用于任何浏览器
✓ 您的数据永远不会离开您的设备
✓ Unique number mode for fair lottery draws