Random Number Generator

Generate random numbers within specified ranges with multiple options and statistics

Random Number Generator - Number Range

Common Ranges
Common Counts

Random Number Generator Tool Guide

Random Number Generator is a free online tool that can quickly generate random numbers within specified ranges, supporting custom parameters like minimum value, maximum value, and number count. Supports quick selection of common ranges (e.g., 1-10, 1-100, 1-1000, etc.) and quick selection of common counts (e.g., 1, 3, 5, 10, 20, 50, 100, etc.). Supports allow duplicates or disallow duplicates option, supports sorting option (sort from small to large). Generated results displayed in real-time, supports single copy or copy all for easy use. Automatically calculates statistics (count, minimum, maximum, average) for easy analysis. All random numbers generated locally in browser using browser native random number generator, no data uploaded to servers, completely protecting your privacy.

Supports custom range and count, flexible configuration
Supports duplicate control and sorting, practical statistics
Local generation, one-click copy, privacy security

Tool Features

Flexible Range and Count Configuration

Supports custom random number range: can set minimum and maximum values, supports integer ranges (e.g., 1-100, 0-9, etc.), can also set arbitrary ranges (e.g., -100 to 100, 1 to 10000, etc.). Supports setting number count (1-100), can adjust through slider or direct number input. Supports quick selection of common ranges (1-10, 1-100, 1-1000, 0-9, 1-6, 1-20, 1-50, etc.), suitable for common scenarios (such as dice, lottery, testing, etc.). Supports quick selection of common counts (1, 3, 5, 10, 20, 50, 100, etc.), improving operation efficiency. All configurations have real-time validation, ensuring parameters are reasonable (minimum value cannot be greater than or equal to maximum value, when duplicates not allowed, count cannot exceed range size).

Smart Duplicate Control and Sorting Features

Supports allow duplicates or disallow duplicates option: when duplicates allowed, can generate random numbers with same values (suitable for lottery, testing, etc.), when duplicates not allowed, ensures each random number is different (suitable for drawing lots, random selection, etc.). If duplicates not allowed and number count exceeds range size, error notification will be displayed. Supports sorting option: can choose whether to sort generated random numbers (from small to large), convenient for viewing and analysis. During generation, processing status (Generating...) will be displayed, providing clear progress feedback. After generation completes, results immediately displayed, single number displayed in input box, multiple numbers displayed in list format, clear and readable.

Convenient Result Management and Statistics Features

Generated results support single copy or copy all: single copy can copy any one random number, copy all will copy all random numbers in comma-separated format to clipboard. Generated results displayed in real-time, single number displayed in input box, multiple numbers displayed in list format, each item displays serial number, value and copy button, convenient operation. Automatically calculates and displays statistics: count (total number of generated random numbers), minimum (minimum value among all random numbers), maximum (maximum value among all random numbers), average (average value of all random numbers), convenient for analysis and use. All random numbers generated locally in browser, uses browser native Math.random() function, ensuring randomness and security. All operations have clear visual feedback (Toast notifications), smooth user experience.

How to Use

  1. 1

    Set Random Number Range and Count

    In the number range area, set minimum and maximum values for random numbers. Can manually enter numbers or click common range buttons for quick selection (e.g., 1-10, 1-100, 1-1000, etc.). Minimum value must be less than maximum value, otherwise system will automatically adjust. In the number count area, set number of random numbers to generate (1-100). Can adjust through slider, can directly enter number, or click common count buttons for quick selection (e.g., 1, 3, 5, 10, 20, 50, 100). System will validate parameter reasonableness in real-time, if settings unreasonable, error notification will be displayed.

  2. 2

    Configure Options (Optional)

    In the options area, can configure random number generation options: Allow duplicates (after checking, can generate random numbers with same values, if unchecked, ensures each random number is different). If duplicates not allowed and number count exceeds range size (maximum value - minimum value + 1), error notification "Too many numbers" will be displayed. Sort numbers (after checking, will sort generated random numbers from small to large, convenient for viewing). These options are optional, can use default values to generate directly.

  3. 3

    Generate and View Results

    After setting range and count, click "Generate Random Numbers" button to generate random numbers. During generation, button will display "Generating..." status. After generation completes, random numbers will immediately display. If only one number generated, will display in input box, can directly copy. If multiple numbers generated, will display in list format, each item displays serial number, value and copy button. Can click "Copy" button to copy single random number, or click "Copy All" button to copy all random numbers (comma-separated). Statistics area will display statistics like count, minimum, maximum, average, convenient for analysis. Can click "Clear" button to clear all results and settings, start over. All random numbers generated locally in browser.

Frequently Asked Questions

Is the distribution of random numbers uniform?
Yes, generated random numbers are uniformly distributed within specified range. Uses browser native Math.random() function to generate random numbers, this function uses pseudo-random number generation algorithm, generated random numbers are basically uniformly distributed statistically. For most usage scenarios (such as lottery, testing, random selection, etc.), this distribution is sufficient. If need cryptographically secure random numbers or extremely high precision uniform distribution, recommend using professional random number generation libraries or services.
What ranges are supported?
Supports arbitrary integer ranges, minimum and maximum values can be any integers (including negative numbers). Range size has no limit, can set very small range (e.g., 0-9) or very large range (e.g., 1-1000000). Number count limited to 1-100, which is sufficient for most usage scenarios. If duplicates not allowed, number count cannot exceed range size (maximum value - minimum value + 1), otherwise error notification will be displayed. If duplicates allowed, there is no such limitation.
Will my data be saved?
No, all random numbers are generated locally in your browser, not saved to any server, and not uploaded to network. Random number generation process completely completed locally, uses browser native Math.random() function, all data only processed in current page memory. Generated random numbers only exist in browser, can choose to copy results or clear content, but will not automatically upload. After refreshing page or closing browser, all data automatically cleared, leaving no traces. Completely protecting your privacy and data security.

Share This Tool

Share this useful tool with your friends and colleagues

Related Tools

Timestamp Converter

Convert between timestamps and date time, supporting multiple formats and timezones

TimestampConverter

Exchange Rate Converter

Convert between different currencies with real-time exchange rates.

ExchangeRate

IP Information Query

Query detailed information about IP addresses including geographic location and ISP details.

IPQuery