Privacy

What you type stays in your browser

Every tool here is a static page with a small amount of JavaScript. A loan amount, a date, a bill total — the calculation runs on your own device, in the page you already have open. There is no code anywhere in this site that sends it onward: no background request, no upload, no connection of any kind opened while you use a tool.

That holds even if JavaScript does not run. The forms have no server to post to — they carry no destination, and none of their fields are named, so pressing a button with scripting disabled sends nothing at all rather than quietly putting your figures in a web address.

Passwords from the password generator are produced by your browser's own cryptographic random-number generator and never leave the page. Nobody, including us, sees a password this site generates.

The Copy buttons

Two tools — Number to Words and the Roman Numeral Converter — have a Copy button that writes that tool's own output to your clipboard when you press it. That is the only clipboard access on the site: it writes, on your explicit click, and nothing here ever reads your clipboard. An automated check in the test suite reads every published page and fails if a third tool ever ships a Copy button while this paragraph still names two.

The one cookie

The site sets exactly one cookie:

• Name: qu_theme
• Value: the word dark or the word light, and nothing else
• If it is absent: the site follows your operating system's light/dark setting
• Lifetime: one year
• Shared with: the other Quizuncle sites, so a theme you pick here applies there too

That is the entire contents. It holds no identifier, no account, no session and nothing that distinguishes you from anyone else who also prefers dark mode. It is a cookie rather than browser-only storage for exactly one reason: so your choice travels with you across the Quizuncle sites instead of having to be made again on each. Choosing System in the theme switcher deletes it.

Local storage

One key, theme, holding light, dark or system. It is the fallback when a browser blocks cookies, and it is the only way the site can tell "I chose to follow my system" apart from "I have never chosen anything". Clearing site data for this site removes it. Nothing else is stored — no history of what you calculated, no saved inputs.

No analytics — and the condition attached to that

There is no Google Analytics, no Plausible, no tracking pixel, no error reporter and no A/B testing tool. There are also no web fonts, images, videos or embeds loaded from anyone else's server — the page is drawn with fonts already on your device. As this site is built today, visiting it makes no request to any company but the one serving the page.

Being straight about the part that could change: the source code contains an optional Google AdSense integration, switched off by a build setting that is not set. While it stays unset — which is how the site is built and published today — no Google script is requested and no advertising markup is produced. If that setting were ever turned on, Google's advertising script would load on every page, ad units would appear on the tool pages, and Google would then be able to see your IP address and set cookies of its own. That would be a genuine change to what this page says, and this page would be rewritten in the same release that made it.

This is not left to memory: an automated check in the site's test suite reads every published page and fails if advertising code ever appears in one. The claim above cannot quietly stop being true.

What the server sees

The site is a set of static files served by Google Firebase Hosting. To send you a page, that server necessarily receives your IP address and your browser's user-agent string — the same as every website you visit. Nothing is layered on top of it: no record of what you typed, no profile, no identifier.

No account, ever

There is no sign-up, no login, no email field and no contact form. Personal details are not collected, because there is nowhere on this site to enter them.

Changes to this page

If any of the above changes, this page changes in the same release as the behaviour it describes — not afterwards. Questions can go to Quizuncle, who builds and runs this site.