Privacy Policy

Last updated: November 2026

The short version: we cannot lose your data, because we never receive it. The star map generator runs entirely in your browser — your locations, dates and messages are not sent to us, not stored by us, and not seen by us.

What runs where

• Star catalog, constellation and city data download from our static file hosting to your browser the first time you open the generator, and are cached. They contain no personal data.
• All computation — sidereal time, star positions, planet positions, drawing — happens on your device, in JavaScript.
• Files you generate (PNG/SVG downloads) are created in your browser’s memory and saved directly to your device. No copy reaches us.
• Share links encode your inputs (place, date, headline) in the URL itself. If you paste such a link to someone, they — and anyone they give it to — can read those inputs. We do not collect them.

What we do collect

Server logs

Our hosting (Cloudflare) records standard request logs: IP address (in truncated form where available), requested URL, timestamp, user agent, and similar technical fields. These are used for security and aggregate statistics, retained for a limited period, and not used to identify you personally.

Email

If you email us, we keep your message and address to reply, and for as long as needed to handle the conversation. We do not send newsletters unless you explicitly ask.

Advertising

The site displays advertising from third-party networks (such as Google AdSense, where applicable). These vendors may use cookies or similar technologies to serve and measure ads, and may collect information about your visit for that purpose. You can opt out of personalised Google advertising via Google Ads Settings, and manage other vendors via your browser settings or aboutads.info. We do not share any personal data with advertisers — we don’t have any to share.

Children

The site is a general-audience tool; we do not knowingly collect personal information from children, and, as above, the generator itself transmits nothing.

Changes

If this policy changes materially, we will update this page and the date at the top. Continued use after changes constitutes acceptance.

Contact

Questions or requests: hello@starmapgen.com.