FAQ

Pick a fair random number in any range — quick answers about privacy, fairness, and limits.

Using the tool

How random is the draw?

Selection uses the browser’s cryptographic random number generator (crypto.getRandomValues) via the shared utility-core helpers.

What does no-repeat mode do?

Each drawn number is removed from the pool until none remain. The pool then auto-resets and a visible notice is shown.

How do exclusions work?

Enter comma-separated integers or inclusive ranges such as 13, 20-25, 40. Invalid tokens show live validation feedback.

Is history saved forever?

No. History is session-only (sessionStorage) and clears when you clear history or end the browser session. Settings like min/max persist in localStorage.

Is data stored on a server?

No. Preferences and session history stay in the browser only. Nothing is collected or stored server-side.