ToolHorizon

Random Number Generator

🎲 Generation Modes
All the ways you can generate random numbers
🔢

Single Integer

Generate one random whole number between a min and max value you define.

Range 1–100 → 73
📋

Multiple Numbers

Generate a list of N random numbers at once, with or without repeats.

5 numbers, 1–50 → 12,7,44,3,29
🎯

Unique Set (No Duplicates)

Generate a set of random numbers where each number appears only once — like a lottery draw.

6 unique from 1–49
🎲

Dice Roller

Roll standard dice: d4, d6, d8, d10, d12, d20, or a custom-sided die. Roll multiple dice at once.

3d6 → 4+2+6 = 12
🔡

Random from List

Paste a list of items and randomly pick one or more from it — great for decisions and giveaways.

Alice, Bob, Carol → Carol
📊

Decimal Numbers

Generate random numbers with decimal places between 0 and 1, or any custom decimal range.

Range 0–1 → 0.7382
🚀 How to Use
Generate random numbers in seconds
1

Choose Your Mode

Select the generation mode: Single Number, Multiple Numbers, Unique Set, Dice Roll, or Random from List.

2

Set the Range

Enter your minimum and maximum values (e.g. 1 to 100). For dice, select the die type. For lists, paste your items one per line.

3

Set Quantity & Options

If generating multiple numbers, set how many you want. Toggle "No Duplicates" to ensure each result is unique. Enable "Sort Results" to get them in order.

4

Generate & Copy

Click Generate. Your random number(s) appear instantly. Click Copy to copy all results to your clipboard or Regenerate to get a new set.

💡 Use Cases
Real-world uses for random number generation
🎁

Giveaways & Contests

Fairly pick a random winner from a list of entrants for contests and prize draws.

🎮

Games & Tabletop RPG

Roll dice for board games, RPGs like D&D, and decision-making games.

🔬

Research & Sampling

Generate random sample IDs or randomize the order of test subjects for studies.

🎓

Education

Generate random math problems, quiz order, or pick random students to answer.

🔐

Temporary Codes

Generate random PINs or numeric codes for temporary access or verification.

🍕

Decisions

Can't decide what to eat, watch, or do? Add your options to a list and let the tool decide.

✨ Pro Tips
🎰

Lottery Numbers

For popular lotteries: set range to your lottery's number pool (e.g. 1–49) and quantity to the required picks (e.g. 6), with No Duplicates enabled.

🔀

Shuffle a List

To randomly reorder items (shuffle), paste your list and generate all items — they'll be returned in a random order. Great for randomizing quiz question order.

🌱

Seed for Reproducibility

Some generators allow a "seed" value — the same seed always produces the same sequence. Useful in research when you need reproducible randomization.

⚠️

Not for Cryptography

Browser-based random number generators use pseudo-random algorithms. They're fine for games and decisions but should not be used for security-critical cryptographic applications.

❓ Frequently Asked Questions
Are the generated numbers truly random? +
Browser-based tools use pseudorandom number generators (PRNG) — algorithms that produce sequences that appear random but are determined by a starting seed. For almost all practical purposes (games, picks, sampling) this is perfectly adequate. For cryptographic security, you'd need a hardware random number generator or a cryptographically secure PRNG.
Can I generate the same numbers again? +
Standard random generation won't reproduce the same result. Some generators offer a "seed" feature where entering the same seed value always produces the same sequence — useful for research, testing, or games that need replayability.
What is the difference between a random integer and a random decimal? +
A random integer is a whole number (no decimal places), like 7, 42, or 99. A random decimal (floating-point) includes fractional parts, like 0.7382 or 3.14159. Use integers for most everyday purposes; decimals are useful for simulations, probability, and scientific calculations.
How do I pick a random winner from a list of names? +
Use "Random from List" mode. Paste all participant names (one per line) into the list input, set quantity to 1 (or however many winners you need), and click Generate. The tool picks randomly with equal probability for each entry.
Is there a limit on how many numbers I can generate at once? +
Most generators support generating up to 10,000 numbers at once. Very large sets may take a moment to process and display. For very large datasets, consider exporting the numbers to a text file for easier handling.
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