Random Number Generator
Draw random numbers in any range using your browser's cryptographic random generator — with optional no-repeat mode.
What can you use it for?
Raffle and giveaway draws, picking who goes first in a game, sampling rows for a survey, choosing lottery-style numbers, assigning random orders for presentations, or generating test data. Enable No repeats when every pick must be different — like drawing names from a hat.
Frequently asked questions
How random is it really?
It uses crypto.getRandomValues() — a cryptographically secure source, far better than the plain Math.random() used by many online tools, and unbiased across your range.
Can it pick negative numbers or decimals?
Whole numbers in any range from -10⁹ to 10⁹. For decimals, generate in a bigger range and divide.