Password Generator
Generate strong, cryptographically secure passwords with custom length and character sets.
Random Number Generator
Avezom Tools Random Number Generator is a fast, versatile tool for picking truly unbiased random integers within any custom numerical range. Whether you are conducting a giveaway drawing, picking lottery numbers, rolling dice for tabletop gaming, conducting statistical sampling, or assigning randomized groups in a classroom, this tool delivers instant, mathematically uniform results. You can define any positive, negative, or zero boundaries, generate up to 100 numbers simultaneously, toggle duplicate prevention using a Fisher-Yates shuffle algorithm, and sort your numbers in ascending or descending order.
Generated Results
1 result
42
All numbers are generated in your browser using
crypto.getRandomValues() with rejection sampling to eliminate modulo bias. 100% fair and unbiased.
How to Use the Random Number Generator
Define your range boundaries
Enter the minimum and maximum integer values. Negative numbers, zero, and ranges spanning millions are fully supported.
Set quantity & duplicate options
Choose how many numbers to generate (1 to 100). Check "No duplicate numbers" if you need unique picks (like raffle tickets or lottery balls).
Generate, sort, and copy
Click Generate Numbers. Choose between unsorted, ascending, or descending order, then click Copy All.
Key Math & Randomness Features
Zero Modulo Bias
Uses rejection sampling over 32-bit cryptographically secure integers to guarantee uniform probability distribution across any range.
Fisher-Yates Shuffle
Ensures that no-duplicate sets are drawn with mathematically proven fairness, equivalent to drawing tickets from a sealed physical drum.
Flexible Range Control
Generate single digits (e.g. 1 to 6 for a die roll) or huge numeric spans (e.g. -500,000 to +500,000) with equal precision.
100% Local & Private
Runs entirely client-side without sending range parameters or generated values over the web.
Common Use Cases
Giveaways, Raffles & Contests
Select transparent, provably fair winning ticket numbers for online contests, sweepstakes, and charity raffle drawings.
Tabletop Games & RPG Dice
Simulate polyhedral dice (d4, d6, d8, d10, d12, d20, d100) for D&D, board games, or custom game mechanics.
Classroom & Group Sampling
Assign students into random groups, pick classroom presentation orders, or select survey participants without bias.
Scientific & Statistical Sampling
Generate randomized sample indexes for academic research, quality control batch testing, and computer science simulations.
Frequently Asked Questions
How does this random number generator ensure unbiased randomness?
This generator uses the browser's native Web Cryptography API (crypto.getRandomValues()) paired with a rejection sampling algorithm. This prevents modulo bias and ensures that every number in your specified range has an exactly equal mathematical probability of selection.
Can I generate negative numbers or large number ranges?
Yes. You can specify any integer range from -1,000,000,000 to +1,000,000,000. Negative minimums, positive maximums, and zero boundaries are fully supported.
How does the 'No duplicate numbers' mode work?
When "No duplicates" is enabled, the tool builds a complete pool of unique integers within your range and performs an in-place Fisher-Yates uniform shuffle before selecting your requested quantity. The quantity cannot exceed the total count of integers in the range.
Can I sort the generated numbers automatically?
Yes. You can display generated numbers in Ascending order (lowest to highest), Descending order (highest to lowest), or Unsorted (the exact order in which they were randomly picked).
Can I copy all generated numbers at once?
Yes. A "Copy All" button appears next to your results, copying the complete set of generated numbers as a comma-separated list directly to your clipboard.
Does this tool require an internet connection after loading?
No. Once the page is loaded, the number generator runs 100% locally in your browser with zero network requests. It continues working even if your device goes offline.
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