Measurement tools,
done right.
Free, accurate, browser-based tools. No signup, no downloads, no catch.
Free forever
No signup, no paywalls, no premium tier. Every tool stays free, always.
Calibrated for accuracy
Tools calibrate to your exact screen for real, true-to-scale results — not a generic guess.
Nothing to install
Runs instantly in your browser on desktop, tablet, or phone. No app, no download.
Tools
1 availableBuilt for accuracy, not just convenience.
Most on-screen tools assume a generic device and hope for the best. We take a different approach — our Online Ruler calibrates directly to your screen using a credit card match, your exact device model, your screen's diagonal size, or manual PPI entry, so measurements reflect real, physical scale.
What's next
More measurement tools are on the way, all built with the same principle: fast, accurate, and free, with nothing to install.