Spin the Wheel (spin-the-wheel.tech) is a free random picker wheel built on real cryptographic randomness instead of the fake-random algorithm most spinner tools use.
Most online wheel spinners rely on Math.random() โ a pseudo-random function whose internal state can actually be reconstructed from its outputs, meaning results can be predicted. Spin the Wheel uses crypto.getRandomValues() instead, the same Web Cryptography API standard that generates HTTPS session keys, so every spin is genuinely unpredictable and every entry gets a mathematically equal chance.
You don't have to take that on faith, either โ a built-in fairness test runs 10,000 simulated spins in under a second and shows you exactly how often each entry landed.
Key features:
Add unlimited names or options, spin instantly Remove & Spin Again for picking multiple winners without repeats Built-in 10,000-spin fairness test to verify randomness yourself Recent Winners log to track every result No account, no download, no cost, no entry limits Works on any modern browser, desktop or mobile, and nothing you type ever leaves your device โ the whole thing runs client-side. Popular for classroom name-picking, giveaway winners, team standups, and any decision where "fair and unarguable" actually matters.
Math.random()
a pseudo-random function whose internal state can actually be reconstructed from its outputs, meaning results can be predicted
crypto.getRandomValues()
he same Web Cryptography API standard that generates HTTPS session keys, so every spin is genuinely unpredictable
10,000-spin fairness test
fairness test to verify randomness yourself
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Spin the Wheel (spin-the-wheel.tech) is a free random picker wheel built on real cryptographic randomness instead of the fake-random algorithm most spinner tools use. Most online wheel spinners rely on Math.random() โ a pseudo-random function whose internal state can actually be reconstructed from its outputs, meaning results can be predicted. Spin the Wheel uses crypto.getRandomValues() instead, the same Web Cryptography API standard that generates HTTPS session keys, so every spin is genuinely unpredictable.
Every option gets an equal shot Each entry you add takes up an identical segment of the wheel. Whether you have 2 options or 20, every one has exactly the same probability of being selected. The wheel doesn't weight results, remember preferences, or skew toward recent winners.
Giveaway hosts & streamers โ anyone picking a winner with real prizes or an audience watching, where "was that rigged?" is a real question they need a real answer to (not just "trust me") Teachers โ calling on students or assigning groups fairly, where favoritism (even unintentional) has social consequences in a classroom Team leads & managers โ deciding standup order, task assignment, or on-call rotation, where perceived fairness affects team morale Developers/technical users โ people who'll actually notice and care that it says crypto.getRandomValues() instead of Math.random(), and who might dig into why that matters
Frontend: Vanilla HTML, CSS, and JavaScript โ no framework (no React/Vue/etc.). Each page is a self-contained HTML file with inline styles, keeping things fast and dependency-free.
The core differentiator: The Web Cryptography API (crypto.getRandomValues()) โ the actual randomness engine behind every spin, and the whole reason "Cryptographic" is in the name. This is a native browser API, not a library.
Rendering: HTML5 Canvas API for drawing and animating the wheel itself (segments, spin physics, easing).
Typography: Self-hosted variable fonts โ Fredoka (display) and Nunito (body) โ served as .woff2 with preloading for performance.
Hosting/infra: Vercel (static hosting), with vercel.json handling redirects, security headers, and caching rules.
No backend, no database โ this is a deliberate architectural choice, not a gap. Everything runs client-side; there's no server processing or storing user entries, which is also the basis of the privacy claim ("your data never leaves your device").
I built the site after testing popular online wheel spinners and finding that all of them relied on Math.random() โ a pseudo-random algorithm whose internal state can be reconstructed from observed outputs โ rather than a cryptographically secure source. Spin the Wheel was designed from day one around crypto.getRandomValues(), the Web Cryptography API standard used in HTTPS and browser security, so that teachers, giveaway organisers, and teams can rely on every result being genuinely unpredictable and verifiable.
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