Privacy Policy

Effective Date: January 1, 2026

1. Client-Side Execution

OnlineRuler runs entirely in the user's browser. Measurements, screen dimensions, guide lines, and calibrations are processed exclusively on your device and are never transmitted to our servers.

2. Local Storage

We use browser localStorage solely to remember your chosen theme (Dark/Light/Blueprint), selected unit (cm/in/px), and calibrated PPI so that you don't need to recalibrate on subsequent visits.

3. Third-Party Analytics

We do not use intrusive tracking cookies, nor do we sell user data to third parties.