Generate random numbers online for free with the Utilivox Random Number Generator. Set your minimum and maximum values, choose the number of results, avoid duplicate numbers, sort results, and copy or download your numbers instantly. This mobile-frie
Engine Version:1.0
Reviewed:October 31, 2026
Attribution:Utilivox Technical Team
âVerified Algorithm
FREE ONLINE TOOL
Random Number Generator
Generate random numbers instantly between any minimum and maximum value. Choose how many numbers you need, avoid duplicates, and copy or download your results.
Generate Random Numbers
Set your number range and choose the number of results you want to generate.
Your Random Numbers
0 numbers
Your generated numbers will appear here.
Ready to generate random numbers.
Tip: Enter whole numbers for the minimum and maximum values. Enable Unique Numbers if you need results without duplicates. The generator supports up to 1,000 results per generation.
Free Online Random Number Generator
This free Random Number Generator helps you create random whole numbers within a range you choose. Enter a minimum value, set a maximum value, and select how many numbers you want. The tool generates results directly in your browser without requiring registration, a paid API, or a server-side calculation service.
You can use the random number generator for classroom activities, games, practice exercises, selecting items, creating number lists, and everyday tasks. Optional settings let you generate unique numbers and sort your results for easier reading.
How to Use the Random Number Generator
Enter the minimum number for your range.
Enter the maximum number you want to include.
Choose how many random numbers to generate.
Enable Unique Numbers if you do not want repeated results.
Select a result order if required.
Click Generate Numbers to display your results.
Use Copy Numbers or Download TXT to save your generated list.
Key Features
Custom number range: Set your own minimum and maximum values.
Multiple results: Generate up to 1,000 numbers in one operation.
No duplicates: Optionally generate unique numbers within the selected range.
Sorting options: Arrange results in ascending or descending order.
Copy results: Copy the generated list to use in another application.
Text download: Save the results as a TXT file.
Mobile-friendly: Use the tool on modern phones, tablets, and computers.
Browser-based: The calculation runs locally without a paid API.
What Is a Random Number Generator?
A Random Number Generator is a tool that selects numbers from a specified range according to a randomization method. For example, if you set the minimum to 1 and the maximum to 100, the tool can generate a number anywhere within that inclusive range. You can also request multiple results for activities that need a list of numbers.
Common Uses
A random number generator can help teachers select questions, students practise mathematics, players choose numbers for casual games, and users select random items from a list. It can also be useful for simple simulations and demonstrations. However, the suitability of a random generator depends on the task and the level of randomness required.
Frequently Asked Questions
Is this Random Number Generator free?
Yes. It runs in your browser and does not require a paid subscription or API.
Can I generate numbers between two values?
Yes. Enter the minimum and maximum values. Both endpoints are included in the available range.
Can I generate numbers without duplicates?
Yes. Enable the Unique Numbers option. The number of results cannot exceed the number of available whole numbers in the selected range.
Can I generate multiple random numbers?
Yes. You can generate up to 1,000 results at once.
Can I download the results?
Yes. Click Download TXT to save the generated numbers as a text file.
Is this tool suitable for passwords or security keys?
This tool is designed for general-purpose number selection. Do not use it as a certified security system, cryptographic key generator, or source of guaranteed fairness for regulated drawings.
Important Limitations & Caveats
Only whole numbers within the JavaScript safe-integer range are accepted.
Unique-number generation requires enough available numbers in the selected range.
Results are generated locally and are not saved automatically after you leave or refresh the page.
For lotteries, regulated contests, gambling, or security-sensitive applications, use a suitably audited and approved randomization system.
ADVERTISEMENT
Mathematical Formula
Random Number Generation Formula
To generate a random integer between a minimum value and a maximum value, the tool selects a number from the specified range.
Formula:
R = Min + floor(U Ã (Max â Min + 1))
Where:
R represents the generated random integer.
Min represents the minimum allowed value.
Max represents the maximum allowed value.
U represents a random decimal value greater than or equal to 0 and less than 1.
floor rounds a number down to the nearest integer.
The formula includes both the minimum and maximum values in the possible results.
Step-by-Step Worked Example
Suppose you want to generate a random integer between 1 and 100.
Step 1: Set the minimum value to 1.
Step 2: Set the maximum value to 100.
Step 3: Click the Generate button.
Step 4: The tool generates a random integer within your selected range.
Step 5: The result can be any number from 1 to 100, including both 1 and 100.
Important Considerations & Limitations
Random numbers are generated directly in your browser.
The minimum value must not be greater than the maximum value.
The requested quantity of unique numbers cannot exceed the number of integers available in the selected range.
Generating a large number of results may take longer, depending on your device.
Results are intended for general purposes such as games, classroom activities, and number selection.
Do not rely on this tool for security-critical applications unless its randomness has been specifically verified for that purpose.
Each generation may produce different results.
đ Recommended Companion Tools
Continue your workflow with these verified calculators and utilities:
