Spirit LevelAbout Us
Spirit Level is a free browser tool for checking whether a surface is level, comparing a slope, or lining up an everyday object. It uses your phone’s orientation sensors, so you can take a quick reading without installing an app.
Made for everyday checks
A picture frame, a small shelf, a desk or a camera platform can all benefit from a quick alignment check. Our aim is to make that check straightforward: a large bubble, clear markings and readable angles, with the measuring tool taking priority on a phone screen.
Choose the view that fits the job
The tool includes Dual Axis, Horizontal, Vertical, Plumb Line and Inclinometer modes, with Surface and Wall settings. Modern and Classic layouts offer different ways to read the same measurements. Full screen opens with a horizontal level and includes a Dual Axis option for landscape use.
Green and red readings show whether you are inside your chosen tolerance. Optional sound feedback and supported voice commands help when your hands are busy. You can hold a reading, set a relative zero and save measurements in your browser.
Clear about measurement limits
A phone is useful for everyday checks, but its sensors and contact points affect the result. A thick cover, a camera bump or a moving phone can introduce an offset. Our preparation reminder and camera-bump calibration help you use a consistent setup on a known level reference.
Calibration does not make an unknown surface level, and a decimal readout is not a guarantee of accuracy. Use a suitable calibrated physical instrument for precision or safety-critical work. The mode guide explains what each mode measures and how to position your phone.
Your readings stay in your browser
Measurement calculations run on your device. Saved readings use local browser storage, and you can clear them at any time. Optional speech recognition may use your browser’s speech provider. Our Privacy Policy explains this, along with hosting, fonts and email contact.
Independent and open to feedback
Spirit Level is an independent tool and is not owned, operated or endorsed by Google. If you find a problem or have an idea that would make the tool easier to use, visit Contact Us or email ankitchauhan3296@gmail.com. Please include your phone model, browser and measuring mode when reporting an issue.