Privacy Policy

Last updated: November 15, 2026

LineStencil (linestencil.com) is operated by Shanghai Jushen Intelligence Technology Co., Ltd. ("we", "us"). This policy explains what we collect, how we use and store it, who we share it with, and your rights.

1. What we collect

• Images you upload and the stencils generated. Your image is resized in your browser and sent to our server, which forwards it to our AI providers to screen it and make the stencil. We do not store your images or stencils on our servers. Adjusting, printing and downloading happen in your browser.
• Safety decisions. For each upload and stencil we log the result of our automated safety check (allowed or blocked, the category, a short note and the time). These logs contain no images and no IP address.
• Usage counts. To apply free limits and control costs, we count stencils per IP address per day (deleted automatically after 2 days) and keep daily totals of page events (for example "stencil made", "printed") that contain no personal information.
• Visit statistics. To count visitors, for each page you open we store the page address, the referring website (domain only), the time and a visitor code. The code is a one-way hash of the date, your IP address and your browser type, so it changes every day; your IP address itself is not stored. If you are signed in, the visit is also linked to your account. We set no extra cookies for this.
• Account information (paid plans). When you sign in (for example with Google) we receive your name, email address and profile picture, and we keep your plan, stencil balance and usage history.
• Payment information. Payments are processed by Waffo Pancake as Merchant of Record. We receive your email, the plan you bought and the transaction status; we never receive or store your full card number.
• Reservations. If you reserve a paid plan we store your email, the plan, the time, your country (from your connection) and the referring link.
• Security and hosting. We use Cloudflare Turnstile to block bots, and our host Cloudflare may process IP addresses and request logs to deliver and secure the site.

2. How we use it

To provide and secure the Service, apply limits, process payments, enforce our Acceptable Use Policy, answer support requests, and send you service emails (receipts, renewal notices, and the one launch email if you reserved a plan). We do not use advertising trackers, we do not sell your personal information, and we do not use your images to train AI models.

3. Who we share it with

• OpenRouter, Inc. and Google: AI processing of your images to screen them and make the stencil.
• Waffo Pancake: payment processing, tax and fraud prevention as Merchant of Record.
• Cloudflare, Inc.: hosting, storage and bot protection.
• Google: sign-in, if you choose Sign in with Google.
• Authorities, when required by law or to report child sexual abuse material.

These providers may process data in countries other than your own, including the United States.

4. How long we keep it

Images and stencils: not stored. IP usage counters: 2 days. Safety logs: 13 months. Visit statistics: 13 months. Account data: until 90 days after you close your account or your subscription ends. Reservation emails: until we send the launch email or you ask us to delete them. Payment records: as long as tax and accounting laws require.

5. Your rights

You can ask us to access, correct, export or delete your personal information, or object to how we use it, by emailing [email protected]. Depending on where you live (for example the EU, UK or California), you have additional rights under local law, and we will honor them. You can also complain to your local data protection authority.

6. Children

LineStencil is for adults aged 18 and over. We do not knowingly collect information from anyone under 18.

7. Changes

If we change this policy we will update the date above and, for material changes, email account holders.

8. Contact

Shanghai Jushen Intelligence Technology Co., Ltd., 2nd Floor, Building 3, No. 1036 Xizha Road, Nanqiao Town, Fengxian District, Shanghai 201400, China · [email protected]