Last updated: January 2025
unitconversions.app does not collect any personal data. All unit conversions are performed entirely in your browser using client-side JavaScript. No values you enter into any converter are transmitted to any server, logged, or stored anywhere. You can verify this by opening your browser's Developer Tools, navigating to the Network tab, and performing a conversion — you will observe zero outbound data requests related to the conversion. There is no user account system on this site. No email address, name, location, or any other identifying information is collected or required to use any feature of the site.
We use Google AdSense to display advertisements. Google AdSense may use cookies and similar technologies to serve ads based on your prior visits to our website or other websites on the internet. These advertising cookies are set by Google, not by unitconversions.app, and are governed by Google's privacy policy. Google AdSense never receives any conversion values you enter — it only sees that you visited this page. You can opt out of personalized advertising by visiting Google Ads Settings. You can also manage cookie preferences through your browser settings or by using a browser extension that blocks advertising cookies.
We use Google Analytics 4 (GA4) to understand how users interact with the site in aggregate. Google Analytics collects anonymized data including pages visited, time on page, device type (desktop/mobile/tablet), browser type, country-level location (not city or street level), and how users arrived at the site (direct, search, referral). This data is used solely to improve the site — for example, to understand which converters are most used, which pages take too long to load, or whether mobile users are having a good experience. Google Analytics does not receive any values you enter into the converters. It does not identify you personally. You can opt out of Google Analytics tracking across all websites using the Google Analytics Opt-out Browser Add-on.
We store your dark mode preference in your browser's local storage so the site remembers your preference between visits. This is a single key-value pair (unitconversions-theme: "dark" or "light") stored only in your browser. It is never read by our servers or transmitted anywhere. No other data is written to local storage or cookies by unitconversions.app itself.
We do not store any record of conversions you perform. There is no database of "user X converted 100 kg to pounds on date Y." Each conversion you perform exists only in your browser while you have the page open. Closing the tab or navigating away discards it permanently. We have no way to retrieve past conversions, and we do not want one. This is a deliberate design decision to protect your privacy.
This site uses Google AdSense (advertising) and Google Analytics (aggregate usage statistics). Both are operated by Google LLC and governed by Google's privacy policy. If you are in the European Union or California, Google's data processing is subject to GDPR and CCPA requirements respectively, and Google provides mechanisms for compliance with both regulations. No other third-party services have access to data from this site.
This site does not knowingly collect any data from children under the age of 13. The site contains no registration or user-generated content features. Unit converters are general-purpose educational tools appropriate for all ages.
If you have any questions about this privacy policy or how this site handles data, please contact us via the link in the footer. We will respond to privacy inquiries as promptly as possible.