Random Number Generator
Generate one or more unbiased random integers with optional uniqueness.
Enter values
Result
About this tool
Generate integers for draws, ordering, or test data with the browser's cryptographic random source. Rejection sampling prevents modulo bias.
When duplicates are disabled, the requested count cannot exceed the number of integers in the selected range.
Frequently asked questions
Can the same number appear twice?
Yes, unless you select No duplicates.
Can it generate decimals?
No. This tool generates integers only.
Are results saved?
No. Inputs and results are not stored.
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