The short version: Perspective Grids runs entirely in your browser. There are no accounts, no uploads and no tracking pixels. This page lists everything the site touches.
What runs on your device
Every grid, calculator, template and image tool is JavaScript that executes in your browser. When you open a photo in the perspective correction, warp, tilt or vanishing-point tools, the file is read by your browser and never sent to a server. PNG, SVG and PDF exports are generated on your device and downloaded directly.
What is stored in your browser
Two things, both in localStorage, both readable and deletable by you in the browser’s site-data settings: your light/dark theme choice, and the Practice page’s list of completed drill dates (used for the streak counter). Clearing site data removes both. Nothing else is stored; no cookies are set by this site.
Share links
The Share button puts your current settings (angles, lens, horizon, objects) into the page URL. Anyone you send the link to sees those settings. The URL contains nothing else.
Third parties
Cloudflare hosts the site and serves it from its network; like any web host it sees the IP address and request headers of each visit and keeps short-term operational logs. The typefaces are served from this site’s own domain; no font or script is loaded from a third party. No analytics service is installed at the time of writing. If one is added, this page will name it and the date it started.
Advertising
None. If advertising is ever added it will appear only on lesson pages, never inside a tool, and this policy will be updated first.
Children
The site collects no personal information from anyone, including children, and is suitable for classroom use.
Changes and contact
Changes are noted here with a new effective date. Questions about this policy: hello@perspectivegrids.com or the contact page.