Number Tools

Random Number Generator

Generate one or multiple random numbers within a range. Control decimals, duplicates, sorting and quantity.

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Input & settings

Minimum Maximum Quantity Mode Decimal places Allow duplicates Sort results Reduce motion Save on this device

Result

Configure the tool, then run it.

Result history

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Quick answer

What does Random Number Generator do?

Random Number Generator creates integers or fixed-precision decimal values inside an inclusive range. It rejects impossible no-duplicate requests and can sort or export up to 1,000 generated values.

Range limit: -1,000,000,000 to 1,000,000,000
Quantity: 1 to 1,000
Precision: 0 to 8 decimal places
Selection method: Unbiased Web Crypto integer mapping

About this tool

Why use Random Number Generator?

Generate cryptographically random integers or decimal values within a range. Range and quantity checks prevent impossible no-duplicate requests, while sorting and CSV export make larger result sets practical.

How to use it

Enter minimum and maximum values.
Choose integer or decimal mode and quantity.
Set duplicate and sorting preferences.
Generate, copy or download the timestamped results.

Common use cases

Create sample IDs
Pick numbered tasks
Generate practice values

Practical examples

Generate five unique exercise numbers from 1 through 30.
Create a reproducibility-free sample of decimal test values.
Choose numbered tasks for a workshop.

How it works

Random values come from window.crypto.getRandomValues(). Lists are shuffled with an unbiased Fisher–Yates process. For a wheel, the result is chosen before the animation; for weighted entries, each positive weight defines its share of the total probability.

Limits to understand

Generated values are not persistent identifiers.
Decimal mode samples fixed increments rather than every real number.
Do not use the tool as a regulated gambling system.

Privacy

Input and results stay inside this browser during normal use. Local saving is optional. If you select Create Share Link, the visible list and settings are uploaded under a hard-to-guess token and expire automatically.

Last reviewed: August 27, 2026