Generate Random Numbers or Pick from a List
Result:
Please enter valid minimum and maximum values and press "Generate".
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🎲 Overview: Free Online Random Number Generator (No Repeats) & List Picker
The Advanced Random Number Generator is a free online randomizer that lets you generate integers in any range with or without repeats (unique numbers only), control sorting, use reproducible seeds, and even switch to a List Picker mode to act as a random name picker or task picker.
This makes it useful for:
- 🎮 Games, contests, raffles, and tabletop dice rolls
- 👨🏫 Classroom demonstrations of randomness, pseudo-randomness, and sampling
- 📊 Simple simulations, testing, and code prototyping
- 📋 Randomly assigning people to groups or picking winners from a list
- 🤔 Everyday decisions where an unbiased pick is helpful
For quick draws you can use the simpler random number generator, or explore more tools in the Random Number Generators hub.
📐 How It Works: From Math.random() to Seeded Random Number Generator
In number mode, the core formula for each random integer is:
Random Integer = Math.floor(RNG() * (max - min + 1)) + min
Where RNG() is either:
- Math.random() when no seed is entered (standard browser pseudo-randomness)
- A simple, deterministic seeded generator when a seed value is provided
When Allow repeats is disabled, the tool ensures uniqueness by tracking values in a
JavaScript Set and re-drawing until the desired count is reached, as long as the range is large enough.
In list mode, the RNG chooses indices inside your item array instead of numeric ranges:
- If repeats are allowed, each pick is an independent random index.
- If repeats are not allowed, items are removed from a temporary pool once selected.
The seed (if present) influences all draws so that running the same settings again produces the same sequence – useful for teaching and reproducible examples.
📊 Example 1: Dice Simulation (d6)
Goal: Roll a 6-sided die 10 times, sorted ascending.
- Mode: Numbers
- Min = 1, Max = 6
- Quantity = 10
- Allow repeats = ON
- Sort ascending = ON
- Seed = blank (pure pseudo-random)
Possible result: 1 ⚀, 1 ⚀, 2 ⚁, 3 ⚂, 4 ⚃, 4 ⚃, 5 ⚄, 5 ⚄, 6 ⚅, 6 ⚅
📊 Example 2: Picking Random Names from a List
Goal: Randomly pick 3 students from a class list of 10.
- Mode: List
- Items: one student name per line
- Pick count = 3
- Allow repeats = OFF (each student only once)
- Seed = "class-demo-1" (optional)
Possible result: Alice, Fatima, Jonas
🧩 Real-Life Use Cases for a Random Number Generator & Name Picker
- 🎮 Games & Tabletop: Simulate dice, generate initiative order, or draw random encounters.
- 📋 Random Name Picker: Choose winners for a giveaway or assign tasks randomly.
- 👨🏫 Teaching Probability & Statistics: Demonstrate sampling, pseudo-randomness, and seeding.
- 📊 Simulation & Testing: Generate input data or sample indices for quick experiments.
- 🤝 Decision Helper: Let the RNG pick who goes first, which option to try, or which route to test.
❓ Frequently Asked Questions about this Advanced Random Number Generator
What is the difference between this and the simple random number generator?
The advanced tool includes sorting, presets, seeds, basic statistics, a history panel, and a list picker mode. The simple version is lighter for quick tasks; this one is ideal when you want more control or want to teach concepts.
What does the seed field do exactly?
When you provide a seed, the tool uses it to derive a deterministic pseudo-random sequence. That means the same seed plus the same settings will produce the same results again, which is useful for reproducible demos.
Can I use this tool to pick random names?
Yes. Switch to Pick from list mode, paste your names (one per line), set how many items you want, and choose whether repeats are allowed. The tool will then randomly select from your list.
What do the quick preset buttons do?
Presets fill in common ranges and quantities for you, such as rolling a d6, rolling a d20, flipping a coin (Heads/Tails), or generating a random percentage. You can still edit the numbers before you click Generate.
What kind of statistics are shown?
For number mode, you see count, minimum, maximum, mean (average), and how many values are duplicated if repeats are on. For list mode, you see how many items were picked, how many unique results occurred, and whether repeats were allowed.
Is this generator cryptographically secure?
No. This tool is designed for everyday use, teaching, and games. It is not appropriate for cryptographic keys or security-critical applications.
Can I copy, print, or export the results?
Yes. Use the Copy, Export to TXT, Save as CSV, Print, or Save as PDF buttons below the results box to archive or share your outputs.
Important Disclaimer: This random number generator is intended for educational and entertainment purposes only and is not suitable for security-critical or gambling use.