Free online tool
Bulk Random Number Generator
Generate multiple random numbers with custom min/max ranges, no duplicates, sorting, and CSV, JSON, or TXT export.
Generated output runs in your browser. Where available, the tool uses Web Crypto; it does not use a physical true-random source and does not intentionally store generated results on our server.
How to use
- Choose the minimum and maximum values for the range.
- Choose the quantity of random numbers you need.
- Enable decimal numbers when fractional test values are useful.
- Disable duplicates for unique numbers, then sort or export the results as CSV, JSON, or TXT.
Examples and use cases
Built for sample datasets, classroom number lists, QA test values, simulations, random draw preparation, and spreadsheet import using CSV. It can generate multiple random numbers with custom ranges, optional decimals, no duplicate random numbers when the range supports it, sorting, and CSV, JSON, or TXT export.
This is a general-purpose random generator, not legal lottery software or regulated raffle compliance software.
Bulk random numbers with no duplicates
For a bulk random number generator without repeating values, choose a range, choose the quantity, then disable duplicates before generating. The range must be large enough for the quantity, so a request for 200 unique whole numbers needs at least 200 possible whole-number values.
After generation, export the no-repeat list as CSV for spreadsheet import, JSON for fixtures or scripts, or TXT for a simple plain-text list. This workflow is useful for spreadsheet rows, simulations, classroom sheets, QA data, and random draw preparation.
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Bulk export formats
CSV export is useful for spreadsheets and classroom worksheets. JSON export is useful for fixtures and scripts. TXT export is useful when you need a simple plain-text random number list.
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FAQ
Can I generate bulk random numbers without duplicates?
Yes. Turn off duplicates to create a no-repeat list. The selected range must contain enough unique values for the requested quantity.
Can I export bulk random numbers to CSV?
Yes. After generating the list, use the CSV button for spreadsheet import. JSON and TXT export are also available.
Can I use this as a random number generator without repeating?
Yes. Disable duplicates before generating. For whole numbers, each value can appear only once when the range is large enough.
Why can no-duplicate generation fail?
It fails when the quantity is larger than the available unique values, such as asking for 50 unique whole numbers from a range of 1 to 20.
Is this true physical randomness?
No. It uses browser randomness where available, not a physical true-random source or regulated drawing system.
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