Privacy Policy

Last updated: July 11, 2026

This policy explains how FastestUnitConverter (https://fuc.developk.kr, "the Service") handles your information.

🔒 In short: Numbers and units you enter are never sent to or stored on a server — every conversion runs entirely inside your web browser.

1. Conversion Input Data

The Service runs client-side, in your browser. Numbers you type and units you select are never transmitted to an external server — they're processed in browser memory only and disappear when you close the page. We don't collect account, sign-up, or login information.

2. Feedback Form

Text you voluntarily submit through the "Feedback" button is stored and reviewed only to improve the Service. No personal information beyond the message and the page path is collected on submission.

3. Cookies & Advertising (Google AdSense)

This Service may display ads via Google AdSense. As part of this:

Google and other third-party vendors may use cookies to serve ads based on your prior visits.
Google's use of advertising cookies (e.g. the DoubleClick cookie) enables Google and its partners to serve ads based on your visits to this and other sites.
You can opt out of personalized advertising via Google Ads Settings, or opt out of third-party vendor cookies at www.aboutads.info.

4. Analytics

The Service uses Cloudflare Web Analytics and Google Analytics (GA4) to understand visitor traffic.

Cloudflare Web Analytics is cookie-free and only collects aggregate, non-identifying data (page views, approximate region, referrer).
Google Analytics uses cookies to collect usage statistics such as pages visited, time on page, device/browser information, and approximate location. It does not collect directly identifying information (name, email, etc.). See Google's Privacy Policy for details. You may opt out using the Google Analytics Opt-out Browser Add-on.

5. Hosting & Access Logs

The Service is hosted on Cloudflare Pages. Standard server access logs (IP address, browser info) may be processed by Cloudflare for hosting and security purposes.

6. Children's Privacy

This Service is not directed at children under 14 and does not knowingly collect personal information from children.

7. Changes to This Policy

This policy may be updated as needed; changes will be posted here along with a revised date.

8. Contact

For privacy inquiries: [email protected]