Privacy Policy

1. Photos and Drawings You Add

Images you upload and drawings you create on HeightComparisonOnline.com are processed entirely in your browser using HTML5 Canvas and Object URLs. Our optional background-removal feature runs an AI model locally using ONNX Runtime Web; the runtime library loads from the jsDelivr CDN (cdn.jsdelivr.net), which receives your IP address as part of that request, but your image itself is never sent anywhere. Your photos and drawings are never uploaded to, transmitted to, or stored on our servers.

2. Local Browser Storage

We use your browser's standard localStorage to save:

• theme — your preferred display theme (light or dark mode).
• heightcomparison.currentChart and the per-page heightcomparison.chart.* variants — your current comparison stage (selected models, heights, and unit preferences) so your work is preserved if you refresh the page.
• heightcomparison.viewPreferences — your label, grid, and guide display toggles on the comparison board.

None of this leaves your device. You can clear it at any time using the "Reset" button on the comparison board or by clearing your browser's site data.

3. Analytics & Cookies

We use Google Analytics 4 (ID G-NLZ8NSZFCF) to understand visits. It can receive page, device, browser, referrer and approximate-location data and set first-party analytics cookies. For visitors in the EEA, UK and Switzerland, analytics storage defaults to denied. A Google consent message is configured for this domain; limited cookieless measurements may still be sent to Google. If your browser sends Global Privacy Control, we do not load Google Analytics. You can also use the Google Analytics opt-out add-on. Cloudflare Web Analytics is active on this site; its beacon receives request data for aggregate traffic reports. Microsoft Clarity is not active.

4. Advertising

We have applied for Google AdSense but do not currently load AdSense ads. If advertising is enabled, Google and other vendors may use cookies and other identifiers for ad delivery and measurement. We will update this policy and provide the consent controls required in the EEA, UK and Switzerland before serving ads there. You can control personalized Google ads in Google Ads Settings. Read how Google uses information from partner sites.

5. Third-Party Services

Loading our pages may contact Google Tag Manager/Analytics (googletagmanager.com, google-analytics.com) and, only when you use the background-removal feature, jsDelivr (cdn.jsdelivr.net) to load the ONNX Runtime library. These providers receive your IP address and browser information as part of normal web requests. Our fonts are self-hosted and are not loaded from a third-party font service.

6. Your Privacy Rights

EEA / UK (GDPR, UK GDPR): The controller is the operator of HeightComparisonOnline.com, reachable at [email protected]. We rely on your consent (Art. 6(1)(a)) for analytics and advertising cookies, and on our legitimate interests (Art. 6(1)(f)) for site security, essential operation, and replying to emails you send us. You have the right to access, rectify, erase, restrict, or port your data, to object to processing, and to withdraw consent at any time without affecting prior processing. You can also lodge a complaint with your local data protection authority. Some providers (such as Google) may process data outside your country under the EU-US Data Privacy Framework or Standard Contractual Clauses.

US (CCPA/CPRA and similar state laws): We do not sell personal information for money. Allowing advertising cookies may count as "sharing" personal information for cross-context behavioral advertising. You can opt out using Google Ads Settings above, by enabling Global Privacy Control in your browser, or by emailing us. We do not knowingly process sensitive personal information.

Brazil (LGPD): The same rights described above apply to visitors in Brazil. To exercise any right, email [email protected]. We aim to respond within 30 days.

7. Children's Privacy

HeightComparisonOnline.com is a general-audience site and is not directed at children under 13 (or under 16 in the EEA/UK). We do not knowingly collect personal information from children, and we do not serve personalized advertising on content directed to children. If you believe a child has sent us personal information, contact us and we will delete it.

8. Data Retention

Google Analytics data is retained according to the retention period configured on our GA4 property. Support emails are kept only as long as needed to handle your request and are then deleted. Data stored in your browser's localStorage stays on your device until you clear it.

9. Changes to This Policy

We may update this Privacy Policy from time to time. The "Last updated" date at the top shows when it was last revised, and material changes will be highlighted on this page. Questions about this policy can be sent to [email protected].