Privacy

The calculators on this site run entirely in your browser. Your measurements, part lists and prices are never sent anywhere — there is no server to send them to, no account, and no database. Sharing a calculation does not change that: there is nothing to log in to, and nothing leaves your device unless you send somebody a link yourself.

What is stored on your device

Five things, all in your browser's local storage. The cut list optimizer remembers which cuts you have ticked off, so a job survives the screen locking. Any job you save under a name is kept the same way — the measurements you typed, the name you gave it and the date, nothing else. And when you send a cut list from one calculator to another, the drawer box calculator to the cut list optimizer, the parts themselves are written there so the second page can pick them up; that parcel holds the dimensions and labels of the parts, which are measurements you typed.

The fourth is a licence key, if you have bought the print pass or the chart pack: the key itself and nothing else — not your name, not your email, not what you paid or when. It is what lets this browser know it has already been paid, since there is no account for it to look that up from.

The fifth is your answer about ads, if you were asked — the word "granted" or "denied", nothing more. It is kept so the question is asked once rather than on every page.

All five stay on your device, are readable only by this site, and are cleared whenever you clear your browser data. None of it is ever sent anywhere — there is no server to send it to — and nothing in it identifies you. Saving does not create an account: there is still nothing to log in to. Because they live in one browser, saved jobs do not follow you to another device — a share link is how you move one — and clearing site data removes them, so a save is not a backup. You can export or delete the lot from your saved jobs, and the optimizer's "Dismiss" button clears a waiting parcel straight away.

Sharing a calculation

Every calculator has a "Copy link to this layout" button. The measurements travel inside the link — a stair is eight numbers, and those eight numbers are written into the address itself. The link is assembled in your browser: nothing is uploaded, and this site never sees it or knows it exists.

Anyone you send the link to can read those numbers, and so can whatever you paste it into — a messaging app, an email, a job-site group chat may all keep their own copy. A link is a way to hand somebody a layout, not a way to keep one private.

Analytics

We count page views with Vercel Analytics so we know which calculators are worth building more of, and time how fast each page loads with Vercel Speed Insights. Neither sets a cookie or stores an identifier on your device, so neither can follow you between sites or recognise you on a return visit, and both are sent the page's address without the part after the ? — which is where a share link carries your measurements.

Ads

There is no ad on the page at the moment. The site has an AdSense account and Google's script still loads, which is what lets Google look the site over, but no ad unit is placed anywhere — so there is nothing for it to fill and you will not see one.

That script is still a request to Google, and it is worth saying plainly what that hands over: the ordinary things a browser tells whoever it fetches from — the page you are on, your IP address, your browser, and whatever cookie it already had on this device. It may use those on other sites running its ads, even though there is none here to pick.

Where European data protection law applies, the question is put to you by Google's own consent message rather than by this site — it is a certified platform under the IAB's framework and this site is not, so when it is switched on it does the asking and this site stands out of its way. That means the banner is Google's, the record of your answer is Google's, and it is Google's message you go back to in order to change it. This site keeps no answer of its own while that is the arrangement, which is also why there is no button here to withdraw one.

What Google does not get is anything you typed. Your measurements, part lists, prices and saved jobs never leave your browser, so there is no route by which an ad could be picked using them, or by which the shelf you are building could follow you anywhere.

You can change what Google personalises at My Ad Center, and block the cookies outright in your browser's settings — the calculators work exactly the same either way.

Buying something

Checkout happens on the shop's own page, not this one. No card number, billing address or email arrives here — there is no server here for one to arrive at — and the only thing that comes back is a licence key, which you type in and this browser keeps. The site never learns who bought what, which also means it cannot look your key up for you: keep the email the shop sent.

Fonts and hosting

The typeface is served from this site rather than a third-party font CDN, so loading a page does not tell anyone else that you visited. Hosting is Vercel, which keeps standard server request logs.

Getting in touch

Questions go to support@carpentrycalculators.xyz.