Privacy
The short version: your measurements never leave your device, and there is no account.
Last updated
Your measurements
Every tool on this site runs inside your browser. When you build a printable sizer, the PDF is made on your device. When you calibrate your screen or convert a size, the numbers stay on your device. Nothing you type or measure is uploaded.
The on-screen sizer never uses your camera. You hold a card against the screen only to compare its size; nothing about the card is seen, typed or stored.
What is stored on your device
A few small settings are kept in your browser's local storage so you do not have to repeat them: your light or dark theme, your preferred paper size, and your screen calibration. They never leave your device, and you can clear them at any time with your browser's site data.
Analytics and advertising
Visits are counted with Cloudflare Web Analytics. It sets no cookies, stores nothing on your device and does not identify you: it records only totals, such as which pages are read, the country and the type of device. See Cloudflare Web Analytics.
There are currently no Google services and no advertising on this site. If either is added, this page will be updated first, and visitors in the UK and EEA will be asked for consent as required.
Third parties
Fonts and code are served from this site's own domain. The site is hosted on Cloudflare, which processes standard request logs as any web host does.
Children
These are measuring tools with no accounts or messaging. They collect nothing from anyone.
Changes and contact
Any change to this page will be reflected in the date above. Questions are welcome via the contact page.