Free Online Random Number Generator No Repeats

Generate a list of completely unique random numbers. Perfect for drawing raffle winners, assigning unique tasks, or shuffling a playlist without duplicates. This free, browser-based tool requires no signup. If you don't mind duplicates, you can use our standard random number generator.

How to Use the No-Repeats Generator

Generating a list of unique random numbers is simple. Follow these quick steps. To understand the math behind the algorithm, read our complete guide on true random vs. pseudo-random number generators.

• 1
  Set Your Range: Enter the lowest and highest numbers you want to pick from in the "Lower Limit" and "Upper Limit" fields.
• 2
  Set the Amount: Enter how many unique numbers you need in the "Amount to Generate" field. Remember, this number cannot be larger than your total range.
• 3
  Choose Sort Order (Optional): Select whether you want your results sorted in Ascending order, Descending order, or left in the random order they were drawn.
• 4
  Generate: Click the "Generate Unique Numbers" button. Your list of duplicate-free numbers will instantly appear in the results box below. If you just need a single digit, use our random number generator 1-10.

Frequently Asked Questions (FAQ)

How does the generator ensure there are no repeats?

This tool uses a "shuffle" algorithm (similar to drawing cards from a deck). It creates a list of every number in your specified range, shuffles them randomly, and then draws the top amount you requested. This guarantees that you will never see a duplicate number in your results.

Why did I get an error saying I can't generate that many numbers?

You cannot draw more unique numbers than exist in your range. For example, you cannot draw 10 unique numbers if your range is only from 1 to 5. To fix this, increase your upper limit or decrease the amount of numbers you are requesting.

Can I use this for a raffle or lottery with multiple winners?

Yes! This is the perfect tool for drawing multiple raffle winners. Because there are no repeats, everyone has a fair chance, and the same ticket number cannot win twice in the same draw. To learn more best practices, read our guide on how to run a fair digital raffle. For single draws, you might prefer our random number picker 1-100. To split people into groups, try our random team generator.

Is my data saved when I use this tool?

No. All calculations happen directly in your web browser. We do not collect, save, or transmit the numbers you generate.