How it works ↗
REAL ONLINE RULER / A HANDY LITTLE TOOL

Your measurements stay yours.

No account. No upload server. A measuring desk in your browser.

Local processing

This version processes images directly in your browser. It does not send image files or measurements to an application server. Clearing an image releases its local object URL; reloading also clears the photo workspace.

Browser storage

We use local storage for your theme, screen calibration, and up to 50 saved measurements. Use Clear saved in the measurements panel to remove measurements, Reset calibration in the calibration dialog to remove calibration, or clear this site's browser data to remove everything.

Hosting

Your hosting provider may process normal request information such as IP addresses and browser headers. No advertising, analytics, cookies, or third-party fonts are included in this source release. If the operator adds external services, this policy must be updated to reflect those services.

LET’S LINE THINGS UP

A real-world reference.

Hold a standard payment card’s long edge against the orange bar, or enter a known length. No card details needed.

Match this length ↔

Keep your zoom fixed. Recalibrate after changing monitors or display settings. Physical accuracy depends on your reference and alignment.