Link: https://roulette-tool.online/

What it does: pick winners from a pasted list, spin a roulette, decide an order, split teams, roll dice, flip a coin.

Key details:

Uses the browser’s cryptographic RNG (Web Crypto) for fairness

No login / no email — data is processed locally on the device

Mobile-first UI, plus fullscreen mode for projector use

One-tap copy of results

I’d love feedback on: (1) usability on mobile, (2) any confusing wording, and (3) feature requests (e.g., weighting, history, shareable links).

Note: the UI is currently Japanese-first; if that’s a blocker, tell me and I’ll prioritize an English toggle.