Random Number Generator

Random Number Generator

Use this tool for numeric test fixtures, classroom demonstrations and ordinary sampling. Integer mode includes all integers from ceil(min) through floor(max); 1.2 to 4.8 therefore offers 2, 3 and 4. Endpoints must be safe integers after rounding inward, and the inclusive span cannot exceed 2^32 values. Without repeats, the count cannot exceed this available set. Decimal mode requires both boundaries to match the selected decimal places: 1.234 to 1.235 needs at least 3 places. Values are sampled with a stable weighted interpolation and rounded for display, so 0 to 1 at 2 places can display 1.00. Rounded decimal values can repeat even with the checkbox unchecked. JavaScript may display very large values in scientific notation. There is no seed or saved history; copy fixtures you need to reuse. Browser cryptographic randomness does not make this a certified source for security keys, regulated drawings or scientific audit trails.