About Us
Built for every explorer,
everywhere.
Online Compass Pro is a free, browser-based collection of precision sensor tools — no app download, no account, no cost. Just open a page and start measuring.
Our Mission
Navigation tools should be free for everyone.
We believe that basic sensor tools — a compass, a level, a ruler — should never require a download, a subscription, or a privacy trade-off. Modern smartphones already carry the sensors. The web browser already has the APIs. We just connected the two.
Our Approach
All sensors. Zero installs.
Every tool on Online Compass Pro runs entirely in your browser using standard Web APIs — DeviceOrientation for the compass and level, the Geolocation API for GPS-based tools, and the Web Audio API for the noise meter. No data is sent to our servers. Your sensor readings stay on your device.
What We've Built
Eight precision instruments
Each tool is purpose-built, mobile-first, and works the moment the page loads.
Online Compass
Real-time magnetic heading with True North correction, GPS coordinates, heading history graph, target bearing mode, and gamified challenges.
Spirit Level
Check surfaces for horizontal and vertical alignment using your device's accelerometer. Precise to a fraction of a degree.
Ruler
On-screen ruler calibrated to your display's actual pixel density. Supports centimetres and inches.
Speedometer
GPS-powered real-time speed display with odometer, average speed, and top-speed tracking.
Inclinometer
Slope and tilt angle measurement using your device's gyroscope. Ideal for ramps, roofs, and terrain.
Protractor
Tap and drag to measure angles between two lines on screen — great for geometry and DIY projects.
Noise Meter
Real-time decibel readings via your microphone, with a scrolling history graph to track ambient noise levels.
Altimeter
GPS-based elevation readings with gain/loss tracking for hikes, climbs, and outdoor adventures.
Our Values
What we stand for
Privacy First
Sensor data never leaves your device. We don't collect, store, or sell any personal data.
Speed & Simplicity
Every page loads fast with no tracking scripts or heavy frameworks. Open and use in under a second.
Universal Access
Every tool is free forever. No ads, no paywalls, no sign-up. Navigation is a right, not a subscription.
Ready to find your direction?
Open the compass and start navigating — no download, no account, no cost.