Random number generator
Set From and To, then tap the generate button or press Space. Any whole numbers from -1,000,000,000 to 1,000,000,000 work, and if From is larger than To they are swapped for you.
Open Parameters to draw up to 100 numbers at once, sort the results or allow duplicates. Turn on No repeat to draw every number in the range exactly once, like pulling numbered tickets from a hat. The counter shows how many are left, and the pool starts over when it runs out.
Questions
Can I generate numbers without repeats?
Yes. Turn on No repeat. It works for ranges of up to 100,000 numbers, and you can reset the pool at any time from the menu next to the counter.
Is every number equally likely?
Yes. Results come from your device's secure random generator with rejection sampling, so no number is favored.
Can I see earlier results?
Tap the clock icon to see your last 20 results. Tap one to copy it.
Can I save a range I use often?
Yes. Choose Save as preset from the ⋮ menu, give it a name, and it appears under Number on the home screen. Share sends a link that opens the same settings.