Choose a picture as the background, the background can be zoom in or out, as well as moved, and our protractor can measure directly on the picture. You can drag and drop a picture into the background.

Free online protractor tool for digital angle measurement. Web-based protractor with precise measurement capabilities, smart alignment features, and instant results.

This interactive tool is designed to help you learn how to measure angles accurately. The process involves two key skills which you can practice here: first, identifying the angle type (such as acute, …

Free online engineering protractor tool. Measure angles on images with precision. Features include angle locking, reference lines, specialized 180/360 modes, and privacy-first local processing. Ideal …

Use our free Protractor Online Ruler to measure angles directly on your screen. Perfect for students, teachers, and designers.

Free online protractor tool for measuring angles with precision. Interactive digital protractor featuring 180° and 360° modes, printable PDF versions, step-by-step tutorials, and educational content.

Measure angles accurately with our transparent online protractor. Easily upload a picture, position the protractor's midpoint on the angle's vertex, and use zoom, rotate, and move functions for precise …