Privacy Policy

1. Information we collect

Toolbox (the "site") can be used without an account, and we do not collect information that identifies you, such as your name or contact details. Values you enter into a calculator (height, weight, amounts and so on) are used only to produce the result and are not stored on our servers. Image, PDF and text tools run entirely in your browser: your files and text are never uploaded to a server.

2. Remembering your inputs (browser storage)

For convenience, after a successful calculation the values you entered are saved in your browser's local storage and filled in automatically on your next visit. They stay on your device, are never sent to our servers, and are discarded after one year. Use "Clear" on the calculator or delete this site's data in your browser to remove them. Calculators that handle sensitive health information, such as the pregnancy and ovulation calculators, do not save inputs.

3. Advertising and cookies

The site shows ads through Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites. You can learn how Google uses advertising cookies in the Google advertising policy and opt out of personalized advertising in Ad Settings.

4. Analytics (Google Analytics, Naver Analytics, Microsoft Clarity)

To improve the site we use Google Analytics and Naver Analytics, which use cookies to collect usage statistics such as pages visited, time on page, device and browser type, and approximate region. They do not collect information that directly identifies you, and calculator inputs are not sent to them. We also use Microsoft Clarity to record click heatmaps and page navigation; calculator inputs and results are masked and not recorded. See the Google Privacy Policy, the Naver Privacy Policy and the Microsoft Privacy Statement. You can opt out with the Google Analytics opt-out add-on or by blocking cookies in your browser.

5. Server logs

For reliability and security, our servers may keep access logs such as IP address, browser type and time of access for a limited period.

6. External links

Links to other websites are governed by those websites' privacy policies.

7. About results

Results are provided for reference only and do not replace medical, financial or other professional advice.