Random Number Generator
Generate random numbers in a range
This free online random number generator runs in your browser and is part of our Generators collection.
⚡ Random Number Generator
Generate random numbers within a range
⚡
Instant In-Browser Execution
Runs locally in JavaScript without wait times or server delays.
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100% Privacy & Security
Your inputs and files are never stored or logged on remote servers.
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Cross-Device Responsive
Fully optimized for mobile smartphones, tablets, and desktop displays.
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100% Free Forever
No subscription fees, no signups, and no software installations.
How to Use the Online Random Number Generator
1
Set Numeric Range
Enter the Minimum value (e.g. 1) and Maximum value (e.g. 100) for your desired interval.
2
Choose Quantity & Duplicates
Specify how many numbers to generate (1 to 10,000) and choose whether to allow or forbid duplicate numbers.
3
Select Sorting & Format
Choose output sorting: Unsorted (pure random order), Ascending, or Descending, and set comma/space delimiter.
4
Generate & Copy List
Click "Generate Numbers" to produce the random set and copy the results or export as CSV.
Frequently Asked Questions
Common questions about using this free online random number generator.
Are these random numbers fair and unbiased? ▾
Yes. The generator uses cryptographic uniform integer distribution (`crypto.getRandomValues`) to ensure every number in the range has an identical statistical probability of selection, with zero modulo bias.
What is "Unique (No Duplicates)" mode used for? ▾
No-duplicates mode is essential for fair raffles, lottery drawings, classroom seating lotteries, and random sampling where a number cannot be drawn more than once.
Can I generate negative numbers or decimal fractions? ▾
Yes. You can specify negative minimums (e.g. -50 to +50) or adjust precision settings for random decimal floating-point numbers.
What is the maximum range supported? ▾
The tool supports standard 64-bit integer ranges from -9,007,199,254,740,991 to 9,007,199,254,740,991.
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