Privacy Policy
Learn how Free Online Protractor protects your data and privacy with 100% client-side architecture.
Last Updated: January 1, 2026
1. Commitment to User Privacy
At Free Online Protractor, accessible from our online application, your privacy is our highest priority.
Our screen protractor tool operates entirely within your web browser using client-side HTML5 Canvas and JavaScript technology. We do not transmit, upload, store, or process any of your images, blueprints, photos, or measurement data on external cloud servers.
2. Information We Do Not Collect
Uploaded Images & Files: Any PNG, JPG, WEBP, or SVG file you load into the tool stays strictly inside your browser's local memory (RAM).
Measurement Data: Angles, vertex coordinates, ray positions, calibration scales, and custom labels created during your session remain local to your device.
Personal Information: We do not require account registration, email addresses, names, or passwords to use the full feature set of Free Online Protractor.
3. Local Storage & Preferences
We use standard web browser LocalStorage to save your non-sensitive UI settings, such as your selected theme mode (Dark / Light) and preferred interface language.
You can clear your browser's LocalStorage data at any time via your browser settings.
4. Third-Party Analytics & Security
We may aggregate non-personally identifiable browser metadata (e.g. browser type, operating system version, and general screen resolution) solely to analyze performance and ensure cross-browser compatibility.
Because all calculations run client-side, your intellectual property, CAD drawings, and personal assignment photos remain completely confidential.
5. Contact Information
If you have any questions or concerns regarding this Privacy Policy or tool usage, please reach out to us at freeonlineprotractor@gmail.com or through our Contact page.