Measure angles directly from your screen with our free online protractor. Upload a photo, diagram, screenshot, or technical drawing, position the protractor where you need it, and get an instant angle reading in degrees or radians. Adjust the size, rotation, precision, and measurement rays for a clearer view.
Whether you're checking an angle in a school assignment, reviewing a diagram, working with a technical drawing, or simply need a quick digital protractor, everything works directly in your browser—no installation required.
Measure it. Adjust it. Understand the angle.