Spirit Level + Protractor
A real bubble level and angle finder using your phone's tilt sensors.
Open this on your phone
A spirit level needs your device's tilt sensors. Your current device doesn't expose them (most desktops don't) — but your phone almost certainly does.
Motion access was blocked
Reload the page and tap Allow when asked for motion & orientation. On iOS you can also re-enable it in Settings ▸ Safari ▸ Motion & Orientation Access.
Spirit Level & Protractor
Turn your phone into a precision bubble level and angle finder. Lay it flat to level a shelf, or stand it on edge to find any angle.
Works on phones & most tablets · needs motion-sensor permission
Couldn't read the sensors
Stand your phone on an edge against the surface, or hold it flat against a wall.
Tip: tap Calibrate to zero on a surface you know is flat to cancel sensor & case bias. · calibration active
Why you’ll love Spirit Level + Protractor
Instant & free
No signup, no paywall, no limits — Spirit Level + Protractor works the moment the page loads.
Completely private
Everything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any device
Fully responsive and touch-friendly — use it on your phone, tablet or desktop.
Uses your real device
Taps into your actual camera, mic or motion sensors — right in the browser.
How to use it
Open it
No download and no login — the tool is ready right at the top of this page.
Use it
Enter your details or start interacting. Everything updates live as you go.
Get your result
Copy, download or share your result in a single tap. That’s it.
Frequently asked questions
Spirit Level + Protractor is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
No. All sensor data is processed live on your device and never leaves it or gets stored.
Completely. Spirit Level + Protractor runs entirely in your browser (client-side). Nothing you type, upload or generate is sent to our servers, so your data never leaves your device.
No. It works instantly in any modern web browser — Chrome, Safari, Edge or Firefox — on desktop and mobile.
Yes. The tool is fully responsive and touch-friendly, so it works great on phones and tablets as well as computers.
Global Maple System — a software & AI studio. We built Spirit Level + Protractor (and 200+ other free tools) to show what we can do. Need something custom built? We’d love to help.
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Spirit Level + Protractor is one of 200+ free tools from Global Maple System — a software & AI studio. Need a website, app, AI agent or automation? Let’s talk.