Who we are
Mister Blocks (misterblocks.com) designs LEGO-compatible models from a photo of your pieces or from a few words, and shows them with 3D step-by-step instructions. This page says what we keep about you and why.
Your account
You can sign in with Google or with a link we email you. We keep your email address and, with Google, your name, your profile picture and Google’s id for your account. We never see your Google password, and we ask Google for nothing else (no contacts, no files, no mail).
Signing in lets you keep your builds in one place and open them on any device. A cookie keeps you signed in for up to a year; signing out removes it.
Your builds
The photos you send, what you ask for, the chat and the models are stored so the build works and you can come back to it. Builds are public unless you make them private, and a public build can appear in the gallery and in search. The photos and words you send are processed by Anthropic’s Claude to design the models.
Emails you ask for
If you join the email list we keep your address, how often you want it and when you confirmed it. Every email has a link to change that or unsubscribe at once.
Requests and pre-orders
When you ask for a custom build or pre-order a kit, we keep the details you type (name, email, phone, company or shipping address, the idea) so we can answer you. Nothing is charged.
What we log
Your IP address is used to stop abuse (daily limits per visitor) and to guess your country; it is kept with requests and sign-ups. We count page views with Vercel Web Analytics, which sets no cookies. Cloudflare Turnstile checks that forms are sent by a person.
Who helps us run the site
Vercel (hosting), Cloudflare (network, file storage, email sending, robot checks), MongoDB Atlas (database), Twilio SendGrid (email), Anthropic (the AI that designs builds) and Google (sign-in). Each only gets what it needs to do its part. We do not sell your data or use it for advertising.
How long we keep it
As long as your account, build or subscription exists. Ask us and we delete your account, your builds and everything tied to your email within 30 days.
Your choices
You can see and change your builds, unsubscribe from any email, and ask us for a copy of your data or to delete it: reply to any email from Mister Blocks, or write to us through the form on misterblocks.com/solutions. If you are in the EU or UK you also have the right to complain to your data protection authority.
Children
Mister Blocks is for everyone, but accounts are meant for people 13 or older. A child under 13 should use the site with a parent, without signing in.
Changes
If this policy changes we update this page and the date below.
Last updated: 11 November 2026