Privacy Policy

Last updated: November 14, 2026

LineStencil (linestencil.com) is operated by Shanghai Jushen Intelligence Technology Co., Ltd. ("Jushen Labs", "we", "us"). This policy explains what we do with information when you use LineStencil.

Images you upload

When you make a stencil, your image is resized in your browser and sent to our server, which forwards it to an AI image model provider (OpenRouter, which routes the request to Google's Gemini models) to create the stencil. We do not store your images or the stencils on our servers. The provider processes the image to return the result, under its own terms and policies. Adjusting lightness, color, mirroring, printing and downloading happen entirely in your browser.

What else we collect

• Usage counts. To limit free use and control costs, we count how many stencils each IP address makes per day. These counters are deleted automatically after 2 days. We also keep daily totals of page events (for example "stencil made", "printed") that contain no personal information.
• Email, if you reserve a paid plan. We store the email, the plan you picked, the time, your country (from your connection) and the referring link, to email you once when paid plans open.
• Security check. We use Cloudflare Turnstile to block bots. Cloudflare processes technical signals for this purpose.
• Hosting logs. Our host, Cloudflare, may process IP addresses and request logs to deliver and secure the site.

We do not use advertising trackers, and we do not sell or share your personal information for marketing.

Service providers

Cloudflare, Inc. (hosting, storage, security check); OpenRouter, Inc. and Google (AI image processing). Data may be processed in countries other than your own.

Retention

Reservation emails are kept until we notify you about paid plans, or until you ask us to delete them.

Your rights

You can ask us to access, correct or delete your information by emailing hello@linestencil.com. Depending on where you live (for example the EU, the UK or California), you may have additional rights, and we will honor them.

Children

LineStencil is intended for adults aged 18 and over.

Changes

If we change this policy, we will update the date above.

Contact

Shanghai Jushen Intelligence Technology Co., Ltd., 2nd Floor, Building 3, No. 1036 Xizha Road, Nanqiao Town, Fengxian District, Shanghai 201400, China · hello@linestencil.com