STL Editor Online privacy policy

Your model stays on your device. Here is what that means in this version of STL Editor Online.

Last updated: November 2, 2026

Your STL and 3MF files

Model import, parsing, transforms, measurements, simplification, vector sections and export run inside your browser. The application does not send STL or 3MF contents, filenames, vertex data or measurement reports to a server. Downloads are generated locally. The sample model is a static file requested from this website.

Temporary state and preferences

Models and up to 100 edits remain in page memory until you refresh, leave or close the page. They are not automatically saved. Your chosen light or dark theme is stored in your browser’s local storage under “stl-theme”. This version does not set tracking cookies, run third-party analytics or load external fonts.

Website requests

Your browser still requests website pages, scripts, styles and the optional sample model from the host. A hosting provider may process ordinary request information such as IP address, user agent, URL and timestamps according to its configuration. Local model processing does not eliminate those standard web requests.

Your choices

Keep sensitive files on a device you control. Export your changes before leaving. Clear this site’s local storage in your browser settings to remove your saved theme. You can use the tools without an account.

Questions about this policy

See contact and feedback for the current availability of support channels. No feedback form or file upload service is enabled in this version.