TetraKits
Generate random integers within any range — with options for unique picks and excluded numbers. Set minimum, maximum, count, and copy results for raffles, simulations, games, and sampling. The TetraKits Random Number Generator runs entirely in your browser — free, private, and ready on mobile or desktop.
Overview
Classroom raffles, giveaway drawings, A/B test group assignment, and board game mechanics all need unbiased random integers. Set a range, pick count, and generate — with optional uniqueness and exclusions.
How to use the random number generator
- Set the range — Enter minimum and maximum values. Example: 1 to 100 for a percentile draw.
- Choose count and options — Enter how many numbers to generate. Enable unique picks to avoid duplicates, or exclude specific values.
- Generate and copy — Click generate and copy the list. For secure passwords instead of numbers, use the password generator.
Common use cases
- Set the range: Enter minimum and maximum values.
- Choose count and options: Enter how many numbers to generate.
- Generate and copy: Click generate and copy the list.
- Bookmark for quick access: Save the tool for repeat tasks without installing an app.
Frequently asked questions
How random are the numbers?
The generator uses crypto.getRandomValues() for uniform distribution — suitable for raffles, games, and simulations.
Can I generate unique numbers only?
Yes. Enable unique picks so no value repeats within the result set. Range must have enough values for the requested count.
Can I exclude specific numbers?
Yes. Add numbers to the exclusion list. They will not appear in generated results.
Are decimal numbers supported?
This tool generates integers. For decimal random values, scale your range or use a scientific calculator.
Is this random number generator free?
Yes. Unlimited generation with no signup.
