Random Number Generator
Generate random numbers with custom ranges, limits, and output formats.
Last updated: May 10, 2026
Generation Options
Output Options
Generated Numbers
Random Number Generator
A powerful, easy-to-use Random Number Generator that runs entirely in your browser. Generate integers or non-integers within any custom range. Adjust settings to include/exclude limits, allow duplicates, and select how many numbers to generate. Perfect for lottery picks, statistical sampling, giveaways, or any situation where you need true randomness. The output can be fully customized: sort results, place them on one line or separate lines, and define custom separators. Decimals are rounded to four decimal places, and when you enable unique numbers the tool validates your request first: the range must be large enough to supply the quantity you asked for, otherwise it tells you instead of quietly repeating values. Results can be sorted ascending or left in generation order, then copied or downloaded with your chosen separator, all without a single network request.
Why This Tool Exists
What makes this useful — and why I built it this way.
No Loading Times: Instantly generates thousands of numbers without hitting a server.
Customizable: Total control over the output format and constraints.
Private: Since generation is done locally, no one else sees your random picks.
Predictable Edge Cases: Excluded limits never appear in the output, and unique mode refuses impossible requests instead of duplicating values.
When You'd Use This
Real situations where this tool saves the day.
Giveaways & Lotteries: Pick a random winner from a range of entries.
Statistics: Generate random datasets for analysis and sampling.
Decision Making: flip a coin or roll dice equivalent numbers.
Education: Generate math problems or test cases.
Using Random Number Generator
It's straightforward — here's how it works.
Enter your desired 'Lowest number' and 'Highest number'.
Choose whether to 'Include limits' or 'Allow duplicates'.
Specify the 'Quantity of numbers' you want to generate.
Select the 'Type of numbers' (Integers or Non-integers).
Customize 'Output Options' (sorting, layout, separators).
View results instantly and use action buttons to copy or download.
Questions People Ask
Honest answers about how this works.
Is this truly random?
Great question. Numbers are drawn from your browser's built-in random generator, which is a pseudo-random source seeded by the runtime and fast enough to produce thousands of results instantly. That quality is entirely adequate for lottery picks, sampling, and test data, though it is not a hardware entropy source.
Can I really generate decimals?
Short answer: Yes. Switch the type control to non-integers and each result is generated across your full range, then rounded to four decimal places so the output stays readable. Integers are inclusive of both limits when you leave the include-limits option on; decimals land strictly within the range.
What if I ask for more unique numbers than the range holds?
The tool stops and shows an error instead of faking it. Unique mode checks whether your range can supply the quantity first: asking for 500 unique integers between 1 and 100 is impossible, so you are told to widen the range or lower the quantity before any numbers appear.
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