Last updated: October 2026.

The honest summary first: the only data this site produces about you is the page request itself. Everything the calculator does happens inside the tab you’re reading. The longer version, broken down by where data could possibly go:

Where it could go	What it would be	Does it happen?
Our servers	typed values, results	No — there is no backend receiving them
Your own storage	preferences, history	No — nothing is written or kept
Ad networks	cookies, identifiers	Possibly, if ads are enabled
CDN/hosting logs	request metadata	Yes — unavoidable, minimal

Typed numbers stay in the tab

Widths, heights, diagonals, target sizes — the calculator’s inputs are read by the page’s own script and used to repaint the result. No fetch, beacon or form submits them; the script contains no channel that could. You can watch every request the page makes in dev tools: it fetches its own files and stops. Or sever the connection after load — the five modes don’t notice.

The CSS-pixels panel reads properties your browser exposes to every page (devicePixelRatio, screen dimensions, viewport size). Those values are displayed to you, not transmitted — the same caveat applies: they never leave the tab.

Page delivery

Pages are served through Cloudflare’s edge network. Like any host, it necessarily handles connection metadata — your IP address, the URL requested, a timestamp, the browser’s user-agent string — to deliver the response and filter abuse. Since this site has no accounts and stores nothing, there’s no user record for that metadata to attach to on our side.

Advertising

Ad slots, when shown, are filled by third-party networks such as Google AdSense. Those networks can set their own cookies or identifiers to count impressions and, where permitted, tailor what they show. That choice lives with you — Google’s ad settings or a content-blocking browser both work, and every calculator mode is unaffected either way. Inputs you type are not present in any ad request; they’re not on the wire to be captured.

Storage and cookies

This site sets no first-party cookies and writes nothing to localStorage, sessionStorage or IndexedDB. Close the tab and nothing of the session remains — not even a preference.

Questions

Anything unclear in this policy: hello@nxtolerance.com. If the policy changes, the revision lands on this page under a new date.