Utility Tools
Random Number Generator
Generate random integers within any range, one at a time or up to 1000 in a batch. Toggle unique-only to draw without replacement and choose whether to sort the results. Everything runs locally in your browser.
Your input is processed locally in your browser. It is not uploaded to Dueneo.
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How to use
- 1
Set your range
Enter the minimum and maximum values. The generator picks integers in the inclusive range [min, max].
- 2
Choose a quantity
Enter how many numbers to generate (1 to 1000). A single number is shown large; batches are listed in a scrollable grid.
- 3
Toggle unique & sort
Turn on “Unique numbers only” to draw without replacement, and pick ascending, descending or unsorted output.
- 4
Generate & copy
Click “Generate numbers” and use “Copy all” to copy the comma-separated list to your clipboard.
Common use cases
- Pick lottery-style numbers from a fixed range.
- Assign unique IDs or seat numbers to participants.
- Generate randomised sample data for testing or prototypes.
- Shuffle the order of items by sorting on a random key.
Limitations
- Only integers are supported. For decimals, generate an integer and divide by 10/100/etc. in a spreadsheet.
- Unique draws from ranges above 100,000 use a Set-based approach and may take a moment for the maximum 1000 results.
- Maximum range is 1 billion (max − min) to keep generation responsive.