Online Bubble Level
A precise spirit level that works in your browser. No ads, no tracking — just a clean level tool.
Demo
Level
Place your phone on a flat surface to check if it's level. On desktop, a static demo is shown. Grant motion permissions on mobile for live readings.
How to use this level
- On mobile: Grant motion permission and place your device on the surface you want to check.
- Two axes: The left-right vial shows horizontal tilt (X-axis). The front-back vial shows vertical tilt (Y-axis).
- Green = level. When both axes are within 0.5° of zero, the indicator turns green.
- No data leaves your device. Everything runs locally. No tracking.
Frequently Asked Questions
How accurate is this bubble level?
On mobile devices with accelerometer sensors, accuracy is typically within ±0.5°. This matches most physical spirit levels for general use.
Does this work offline?
Yes. Once loaded, everything runs client-side with no internet connection needed.
What is the measurement range?
The level shows tilt up to ±30° on each axis. Beyond that range, the bubble reaches the edge of the vial.
Is this free?
Always free. No accounts, no paywalls, no data collection. Built by Meron Technologies.