STL File Viewer

Privacy Policy

The short version: your files never leave your device, because every tool runs locally in your browser.

STL File Viewer Team · Last updated: 2026-09-23

Files you open or convert

All viewers and converters on this site parse, render and convert 3D files entirely within your browser using JavaScript and WebGL. Your files are not uploaded to any server, not stored, not logged and not seen by us. There is no upload endpoint, no temporary server storage and no model database — closing the tab erases the file from memory.

Data we do not collect

The site has no account system, so it collects no names, email addresses or passwords. It sets no advertising cookies and runs no third-party trackers by default. If a privacy-respecting, aggregate analytics tool is enabled later, this policy will be updated first and the tool will be listed here before it goes live.

Local browser storage

The only data stored on your device is a UI preference: your light or dark theme choice, kept in your browser's local storage by your own browser. It never leaves your device and you can clear it at any time through your browser settings.

Server logs

Like every website, our hosting provider records standard technical request logs (URL, timestamp, IP address, user agent) for security and operations. These logs relate to page visits only, cannot contain model data — because model data is never transmitted — and are not used to profile visitors.

Changes to this policy

If a future feature ever changes this picture — for example an optional cloud conversion — the change will be described here, with a new date, before the feature ships. The promise on every tool page stays the same until then: your file is processed locally in your browser and is not uploaded.