What is the most random number generator?

Physical sources such as RANDOM.ORG's atmospheric noise are truly random rather than formula-based. For everyday picks, a good pseudorandom generator is just as fair.

Does Google have a random number generator?

Yes. Search for random number generator and Google shows a tool where you can set the minimum and maximum.

How do I generate a random number in Excel?

Use =RANDBETWEEN(1,100). It recalculates whenever the sheet changes, so copy and paste the result as a value to keep it.

10 best random number generators

download.fan · Updated November 4, 2026

Short answer

For most people, RANDOM.ORG is the best random number generator (RNG): it's free, has been running since 1998, and draws from atmospheric noise. Use Google's built-in generator for a quick number, Wheel of Names for a live group pick, and RANDBETWEEN when your data's in a spreadsheet. None of these public tools should be used to create passwords or encryption keys.

How were these chosen?

Each is free to use for basic picks, and all were checked as available in November 2026. This list is organized by what each does best, because a classroom pick and a publicly verifiable draw need very different tools.

Which are the 10 best random number generators?

RANDOM.ORG: best overall, using atmospheric noise, with a paid third-party draw service as an option.
Google: best for a one-off. Search for random number generator and set your range.
Wheel of Names: best for picking live in front of a group or class.
Calculator.hair's random number generator: best for batches, with up to 50 decimal digits, sorting and no repeats.
Calculator.net: a simple option that handles integers and precise decimals.
CalculatorSoup: useful for sets of numbers, with or without repeats.
Omni Calculator: a clean option with short explanations alongside the tool.
Excel RANDBETWEEN: best when your list's in a sheet. The same function works in Google Sheets.
NIST Randomness Beacon: best for public, timestamped values, posting a 512-bit block every 60 seconds. It's a prototype service, and NIST warns not to use its values as secret keys.
drand: best for developers who need a verifiable public randomness source.

Which one should I use?

Quick decision: Google or any web generator.
Classroom or stream: Wheel of Names, since everyone can see the result.
Giveaway: RANDOM.ORG, ideally with a screen recording, or its paid draw service for a verifiable record.
Random sample from a list: a spreadsheet, so that your data stays with the picks.
Public proof: NIST's beacon or drand, because anyone can check the published value.
Passwords: none of these. Use a dedicated password generator.

Ready to try it?

Random Number Generator