Random Number Generator (Advanced)
Generate random numbers with configurable range, count, and format.
About Random Number Generator (Advanced)
Random Number Generator (Advanced) produces random integers or floating-point numbers with full control over minimum and maximum range, output count, uniqueness constraints, decimal precision, and output format. Unlike basic random generators that produce a single value, this tool can generate thousands of values in a single operation, sort them, deduplicate them, or format them as JSON arrays and CSV data. The underlying randomness uses Math.random which is suitable for non-security purposes; use the Random Bytes Generator tool for cryptographic applications. It covers every practical use case for random number generation from lottery draws to bulk test data.
How to Use
Set the minimum and maximum values defining your desired range, specify the count of random numbers to generate, and configure options including uniqueness (no repeats), decimal places for floating-point output, and sort order (ascending, descending, or unsorted). Click Generate to produce the values. Select your preferred output format from the format dropdown: one per line, comma-separated, space-separated, or JSON array. Copy the full result with one click for immediate use in code, spreadsheets, or test fixtures.
Common Use Cases
- Drawing unique lottery or raffle numbers from a defined range with the uniqueness constraint enabled to guarantee no duplicates
- Generating bulk random integer IDs or primary key values for populating test databases with realistic-volume seed data
- Creating random floating-point price or measurement values within a specified range for stress-testing data processing pipelines
- Picking random items from a numbered list using random indices for unbiased selection in surveys or experiments
- Generating random port numbers, timeout values, or configuration parameters for automated integration test environments