This site is operated by [your name or business name] (“we”, “us”). You can contact us about privacy matters at [contact email]. If we operate as a registered company, our company name, registration number and registered office are [company details, if applicable].
There is no account system, no sign-up, and no form on this site that submits data to a server. Specifically:
Like any website, this site is served and protected by infrastructure that necessarily processes some technical data for every visitor, regardless of what you do on the page. This site is hosted on Cloudflare Pages, operated by Cloudflare, Inc. As part of delivering and securing the site, Cloudflare's network processes standard request data including your IP address, approximate location derived from it, browser and device information, referring page, and request timestamps. This is used to deliver content, detect and mitigate abuse (e.g. bot traffic, denial-of-service attempts), and produce aggregate, non-identifying traffic statistics. Cloudflare acts as our data processor for this purpose; their own privacy and data-processing practices are described at cloudflare.com/privacypolicy.
This site does not set first-party cookies, and does not currently run any analytics or advertising scripts. Cloudflare may set a small number of strictly-necessary cookies or similar identifiers purely for security purposes (such as distinguishing automated bot traffic from real visitors). These are exempt from consent requirements under UK PECR and the EU ePrivacy Directive because they are strictly necessary for the service to function securely, and contain no information that identifies you personally for marketing purposes.
If we introduce analytics, advertising, or any other non-essential cookie or tracking technology in future, we will update this policy and request your consent first via an on-page cookie banner, in line with UK and EU requirements.
This site uses your browser's local storage — a small amount of data kept on your own device, never sent to us or to any server — for four purposes: remembering your dark/light theme choice, remembering your metric/imperial unit preference so you don't have to reset it on every tool, remembering the last few tools you've viewed so the search feature can suggest them back to you, and remembering which tools you've chosen to pin for quick access from that same search feature.
This is fundamentally different from a cookie or a tracking identifier: it never leaves your browser, we cannot see it, it isn't tied to any account or identity, and it doesn't follow you across devices. You can clear it at any time through your browser's own site-data settings, and the site works normally without it — you'd just lose these saved preferences and suggestions between visits, with everything falling back to sensible defaults (unit preference falls back to a guess from your browser's language setting). We do not use local storage for analytics, advertising, or any purpose beyond these on-device conveniences.
This page loads its typefaces (Space Grotesk, IBM Plex Mono, Inter) from Google's font delivery network
at fonts.googleapis.com and fonts.gstatic.com. Loading a font this way causes
your browser to connect directly to Google's servers, which will receive your IP address and standard
request metadata as part of that connection — independently of this site. Google's processing of this
data is governed by the
Google Privacy Policy.
No cookie or persistent identifier is set by this font loading. If you would prefer not to share your IP
address with Google when this page loads, you can block those two domains in your browser or a content
blocker; the page will still work using your device's fallback fonts.
The Currency category on the Unit Converter is the one place
on this site that requests live data from elsewhere. Switching to that category (or typing a currency
conversion into its quick-convert box) causes your browser to request exchange rates directly from
api.frankfurter.dev, a free, open-source service publishing European Central Bank reference
rates. As with Google Fonts, that request goes straight from your browser to Frankfurter's servers — never
through this site — and Frankfurter will receive your IP address and standard request metadata as part of
it, independently of this site and governed by their own terms. The result is cached in your browser's
local storage for the rest of the day so this only happens once per visit, not on every keystroke. No
other page on this site makes any request like this; everywhere else, the calculation runs entirely on
your device with no outside data involved.
To the extent any personal data (such as an IP address in a server log) is processed as described above, we rely on legitimate interests (Article 6(1)(f) UK/EU GDPR) — namely, operating, securing, and maintaining the availability of the site. We do not process any special category data, and we do not carry out profiling or automated decision-making.
Under UK GDPR, the EU GDPR, and similar data protection laws, you have the right to:
Because we hold very little personal data ourselves, most of these requests will need to be directed to Cloudflare for hosting-level logs; we're happy to help point you in the right direction — contact us at [contact email].
Cloudflare operates a global network, so technical request data may be processed in countries outside the UK or European Economic Area. Where this happens, Cloudflare maintains appropriate safeguards (including Standard Contractual Clauses and the UK International Data Transfer Addendum) — see Cloudflare's own compliance documentation for details.
If you are visiting from outside the UK/EU — including the United States, Canada, Brazil, Australia or elsewhere — the same principle applies: we do not sell, share, or monetise your personal data, and we collect the minimum technical data necessary to run a static, browser-based tool. If your local law (e.g. the California CCPA/CPRA, Brazil's LGPD, Canada's PIPEDA) grants you equivalent or additional rights, you're welcome to contact us to exercise them, though in practice there is very little data to act on.
This site is a general-purpose engineering reference tool, not directed at children, and we do not knowingly collect personal data from children.
We may update this policy from time to time, for example if we add analytics or advertising. We'll update the “last updated” date above, and flag any material change on the site itself.
Questions about this policy can be sent to [contact email].