About SpinTock

SpinTock is an independent project making free, fast, private tools that run in your browser.

Our mission

Small decisions and everyday timing shouldn't need an app download, an account or a page full of distractions. Sometimes you just need a quick answer: how many sleeps until Christmas, who presents first, how long is left in this focus session. SpinTock aims to give you that answer in seconds, on any device. Each tool does one job and tries to do it well.

How the tools are built

• No accounts: nothing to sign up for and no login screen. You can start using a tool the moment it appears.
• Private by design: what you type is processed in your browser. Lists and settings, such as your wheel entries or "snow on or off", are saved only on your own device. Secret Santa private links store each match inside the link, so no server ever holds the results.
• Fair randomness: random results (wheel spins, name draws, team splits and winners) come from crypto.getRandomValues, the cryptographically secure generator built into modern browsers. The outcome is fixed first; any spinning or rolling afterwards just reveals it.
• Lightweight pages: plain static HTML with a small amount of JavaScript, and no third-party fonts or frameworks, so pages load quickly even on slow connections.

How we test them

The parts of each tool that pick, draw, split or time things are written as small, separate pieces of code with automated tests. The tests run 100,000 simulated wheel spins to confirm the wheel always stops on the result that was chosen. They make thousands of Secret Santa draws to check no one ends up with their own name and every exclusion holds, and thousands of team splits and giveaway draws to check that results are valid and spread evenly. The focus timer's tests check that time is calculated from the clock rather than counted, so it stays accurate when a tab is in the background.

Accessibility and performance

• Tools can be used with a keyboard, with a visible outline showing where you are.
• Results and status messages are announced to screen readers.
• Spinning wheels, confetti, snow and fireworks respect your device's reduced-motion setting.
• Space for future ads is reserved in advance, so the page doesn't jump while it loads.
• We use Google's Lighthouse audits to check performance, accessibility and contrast.

If something doesn't work well with your setup, please tell us. Accessibility problems are treated as bugs.

How SpinTock is funded

The tools are free to use. We plan to fund the site with display advertising, and we use privacy-friendly analytics to see which tools are popular. The privacy policy explains how ads, cookies and analytics work here.

Suggest a tool or report a bug

Is there a tool you wish existed, or something an existing tool should do? Found something that doesn't work, or a mistake in the text? Get in touch through the contact page. For bugs, it helps to mention the page, what you expected to happen, and your device and browser.