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Bubble Level Tool
Place your device flat on a surface to check if it is level. Requires device orientation sensors.
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Sensor Permission Required
To detect tilt and level, this tool needs access to your device's motion sensors.
About the Online Bubble Level
The Online Bubble Level is a pure front-end tool that utilizes your smartphone's built-in gyroscope and accelerometer. It instantly turns your device into a high-precision digital spirit level without needing to download any apps.
Common Usage Scenarios
- Home DIY: Hanging pictures, installing shelves, or adjusting washing machine feet to make them perfectly level.
- Photography: Place on top of a camera or tripod to calibrate the horizon line and prevent slanted photos.
- Woodworking: Temporary surveying, desk flatness checking, and woodworking DIY measurements.
Core Advantages
- Absolute Privacy: Built with the HTML5 DeviceOrientation API. Sensor data is calculated locally in memory and never uploaded.
- Custom Calibration: Modern phones have camera bumps. The "Calibrate" feature offsets this physical thickness difference.
- 360° Measurement: Independent tracking of X (Roll) and Y (Pitch) axes provides a more intuitive readout than traditional single-tube bubble levels.
How to Use
1. Open this page (grant sensor permissions if prompted on iOS).
2. Lay your phone flat on the surface you want to test.
3. Watch the blue bubble in the center. When it moves into the inner target ring and the badge turns green, the surface is perfectly level.