Privacy Policy

Last updated: October 2026

OpenCalculator ("we", "our") respects your privacy. This policy explains what information we collect and how it is used.

Information we do NOT collect

Our tools — calculators, converters and generators — run entirely in your web browser using JavaScript. The numbers, text, dates and images you enter into our tools are never transmitted to our servers, stored, or shared. We have no access to them.

Information we collect

• Emails you send us: if you contact us, we receive your email address and message so we can reply. We do not share it or add you to any mailing list.
• Anonymous analytics: we may use privacy-friendly analytics to understand which pages are popular (pages visited, approximate location by country, device type). This data is aggregated and cannot identify you.

Cookies & advertising

We use cookies for basic site functionality. When we display ads (for example through Google AdSense), third-party vendors including Google use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and other sites on the Internet. You may opt out of personalised advertising by visiting Google's Ads Settings.

Third-party links

Our tools may load open-source libraries from public CDNs. These providers may log standard technical data (such as your IP address) according to their own privacy policies.

Children's privacy

Our tools are general-purpose utilities not directed at children under 13, and we do not knowingly collect personal information from children.

Changes to this policy

We may update this policy from time to time. The "last updated" date above will reflect the latest revision.

Contact

Questions about this policy? Reach us via our contact page.