Is an Online Random Picker Really Random?
Understand browser entropy, bias, practical fairness and the limits of general-purpose online drawing tools.
Generate random dates between two endpoints with weekday, weekend and duplicate controls.
🔒 Your list is processed locally in your browser. It is not uploaded unless you create a share link.
Configure the tool, then run it.
Random Date Generator samples calendar dates from an inclusive start and end range. It can exclude weekends, prevent repeats and format each result according to the page language.
Sample dates uniformly from an inclusive calendar range. Weekday-only mode builds the valid date pool before selection, while locale-aware formatting makes exported dates easier to read in your region.
Random values come from window.crypto.getRandomValues(). Lists are shuffled with an unbiased Fisher–Yates process. For a wheel, the result is chosen before the animation; for weighted entries, each positive weight defines its share of the total probability.
Input and results stay inside this browser during normal use. Local saving is optional. If you select Create Share Link, the visible list and settings are uploaded under a hard-to-guess token and expire automatically.
Last reviewed: August 27, 2026
No. Entries are processed in your browser unless you explicitly create a share link.
The browser Web Crypto API supplies unbiased random values. Wheel animation only reveals a result chosen in advance.
Yes. The controls, results and wheel adapt to current mobile browsers and keyboard navigation.
Yes. Device storage can remember recent settings unless you turn off local list saving.
No. It is a general-purpose classroom, work, event and decision tool, not a regulated drawing system.
Understand browser entropy, bias, practical fairness and the limits of general-purpose online drawing tools.
Compare predictable generators with Web Crypto and learn when the difference matters.
Prepare a clean entry list, state rules in advance and preserve a useful result record.