Random Number Generator — Fair, Crypto-Strength
Generate truly random numbers in any range — single or many, with or without repeats. Free, no sign-up, and your files never leave your device.
Free, with no sign-up and no watermark. The file is processed in your browser and never uploaded.
Generate random numbers in any range — one or up to 10,000 at a time, with or without repeats, sorted or not, and with decimal places if you want them. Numbers come from your browser’s cryptographic random generator, without bias.
Step by step
- Set the range: Enter the Minimum and Maximum (both included).
- Choose how many: Set How many and optionally Decimal places.
- Pick options: Tick No repeats for unique numbers, Sort ascending to order them.
- Generate: Press Generate; copy the results with Copy.
Handy for
Giveaways
Pick a winning ticket number fairly.
Classrooms
Call on a random roll number.
Games
Roll numbers for board games or quizzes.
Sampling
Pick random rows from a list for checks.
Good to know
To pick names instead of numbers, use Spin the Wheel.
Questions
Is it truly random?
It uses crypto.getRandomValues with rejection sampling, so every value in the range is equally likely.
Is anything sent to a server?
No. Every calculation runs in your browser, so the numbers you type never leave your device. The page keeps working offline once it has loaded.
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