Effective 17 July 2026 · 3d-lithophane.com
3D Lithophane & 3D Designer is built and run by one person (DevDannyD / Leznad Software). This page explains, in plain language, what data the site handles and what happens to it. The short version: your photos never leave your browser, we collect the minimum needed to run accounts and fair-use limits, and we never sell data to anyone.
When you make a lithophane, your photo is not uploaded. Your browser converts it to an anonymous brightness map (a grid of height numbers) on your own device, and only that number grid is sent to our server to build the 3D model. It is processed in memory and not saved. We never receive or store the picture itself.
If you register, we store:
Designs you save in the 3D Designer are stored in your account and are private by default. They appear in the public gallery only if you mark them public, and you can unshare or delete them at any time. The Wall of Supporters shows your first name only if you opt in, and you can opt out again with one click.
When Supporters use the AI model generator, the text prompt you type is sent to our AI provider (Anthropic) to generate the 3D model, and is handled under their privacy terms. Please don't put personal information in AI prompts — it isn't needed to describe a 3D shape.
Supporter subscriptions are processed by Lemon Squeezy, our payment provider and merchant of record. Your card details go directly to them and never touch this site — we only receive your name, email, and subscription status so we can unlock your account. Voluntary donations via PayPal or WeChat Pay are handled entirely by those services.
To understand which pages are used, the site records each page view with your IP address and browser type, and later resolves the IP to an approximate location (country/region/city). This is used only for the site's own statistics — no advertising networks, no third-party trackers, no data sharing. There are no ad cookies: the only cookie is the session cookie that keeps you logged in, plus a local theme preference stored in your browser.
We send account emails only: verification, password resets, and replies to messages you send us. No marketing lists, no newsletters you didn't ask for.
Email contact@3d-lithophane.com from your account address and we'll delete your account and its data, or send you a copy of what we hold. Active subscriptions should be cancelled first (one click via "Manage subscription").
The site is not directed at children under 13, and we do not knowingly collect their data.
If this policy changes, the new version appears here with a new effective date. Questions: contact@3d-lithophane.com.