About Online Ruler

Online Ruler was created to provide a simple, free, privacy-friendly, and accessible tool for measuring real physical objects on digital screens.

Whether you are an engineer, designer, student, handyman, or everyday user needing a quick measurement without searching for a plastic tape measure, our tool delivers instant accuracy.

Our web application requires zero installation, respects user privacy by storing calibration settings locally, and works across all modern browsers and devices.

Our Core Values