無料オンラインルーレット

Yes. The spin uses JavaScript's Math.random() seeded by timing, producing an unbiased random result across all segments. Each option has an equal probability of winning regardless of how many characters it contains.

You can add as many options as you like, but wheels with more than 20–25 items become visually crowded and text may become hard to read. For large sets, the random draw is still fair, but consider grouping items into categories for better readability.

The wheel items are stored in your browser's local session while the tab is open. Refreshing or closing the tab will clear the list. To save a wheel setup, note down your list and re-enter it next time, or bookmark the page with entries if your browser supports session restoration.

Currently the wheel spins and announces a winner but does not automatically remove that option. To run an elimination-style draw, manually remove the winning entry after each spin and spin again.

The wheel is used for random decisions (where to eat, who goes first), classroom activities (randomly calling on students), giveaway winner selection, game night picks, and any situation where you need a fair random choice from a defined list.

Yes, the ルーレット on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.

カスタマイズ可能なホイールを作成し、回転させて決断を下します。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.

No installation needed. The ルーレット runs entirely in your web browser on any device — desktop, tablet, or mobile.

Completely safe. The ルーレット processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

After the page loads for the first time, the ルーレット works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.

Yes. The ルーレット uses your browser's built-in cryptographically seeded random number generator, which provides high-quality unpredictable randomness suitable for games and fair decisions.

Yes. Where customisation options are available, you can add your own items, set numeric ranges, or adjust parameters before generating. Default settings are designed for the most common use case so you can get an instant result without any configuration.

Yes. The ルーレット is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.

Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.