Privacy Policy

Introduction

This policy explains what information STL Kit handles when you use our browser-based 3D file converter and 3D printing calculators. The core tools are free and do not require an account.

Your 3D files stay on your device

STL Kit processes the 3MF, STL, and OBJ files you select in your browser. We do not upload your model files to our servers, and we do not keep a copy after you close or refresh the page. Downloading our sample project retrieves that public sample from the site; it does not upload anything from your device.

Information stored in your browser

The site may use local browser storage or cookies to remember preferences such as your theme, cookie choice, and calculator settings. You can clear these through your browser settings.

If you use a share-link feature, the link may contain calculator inputs or display settings so another person can open the same configuration. Model files are not embedded in these links. Review the values in a share link before sending it.

Technical information

Like most websites, our hosting provider may process technical request data such as IP address, browser type, requested URL, and timestamps for security, reliability, and abuse prevention. These logs are handled according to the hosting provider's retention policies.

If analytics is enabled, we may collect aggregated usage information such as page views, tool actions, approximate device category, and referring site. We do not send model contents, file names, or raw model data to analytics services. Where required, optional analytics and advertising cookies are used only after the consent choice presented by the site.

Accounts and payments

The public conversion and calculator tools do not require registration or payment. If STL Kit separately offers account, support, or payment features, only the information needed to provide those features will be handled through the relevant service providers.

Data sharing

We do not sell personal information. Limited technical information may be processed by hosting, security, analytics, or communication providers that help operate the site. We may also disclose information when required by law or to protect the service and its users.

Your choices

You can use the core tools without creating an account, clear stored preferences through your browser, and manage optional cookies through the cookie settings when available. To ask about other privacy requests, contact us using the address below.

Security

We use reasonable technical and organizational measures to protect the site. Keeping model conversion on your device reduces exposure, but no online service can guarantee absolute security.

Changes to this policy

We may update this policy when the site's features or data practices change. The date at the top of this page shows the latest revision.

Contact us

For privacy questions, email support@stlkit.io.