About This Tool
Free, precise, and accessible angle measurement for everyone
This online protractor provides professional angle measurement tools directly in your browser. No downloads, no registration, no cost. Built for students, teachers, designers, and engineers who need accurate angle measurements.
Our Mission
We believe that quality educational and professional tools should be accessible to everyone, regardless of budget or location. This online protractor is built to provide accurate angle measurement capabilities without requiring expensive software or physical tools. Whether you're a student learning geometry, a teacher preparing lessons, a designer working on projects, or an engineer solving technical problems, this tool helps you measure angles with precision and ease.
Why We Built This
Traditional protractors have limitations - they can be lost, damaged, or unavailable when you need them. Physical protractors also struggle with digital images and complex measurements. We created this online protractor to solve these problems. You can measure angles on uploaded images, work with multiple protractors simultaneously, export your measurements for documentation, and access the tool from any device with a web browser. No installation, no cost, no barriers.
Who This Tool Is For
Students
Learn geometry concepts, complete homework assignments, and practice with the online protractor. Get instant feedback and visualize angle relationships clearly.
Teachers
Create lesson materials, demonstrate concepts in class, and provide students with a reliable online protractor. Share links to measurements or export images for worksheets.
Designers
Measure angles in design mockups, verify alignment in layouts, and ensure precise angular relationships. Works with uploaded images and supports high-resolution exports.
Engineers
Analyze technical drawings, measure angles in diagrams, and document measurements. Export data as CSV for further analysis or integration with other tools.
Built with Modern Technology
This online protractor is built using Next.js 14 with the App Router for optimal performance and SEO. The canvas-based measurement system uses Konva.js for smooth, responsive interactions. React and TypeScript ensure reliable, maintainable code. Tailwind CSS provides a clean, accessible interface that works in both light and dark modes. The entire application is optimized for speed, with static generation for instant page loads and efficient client-side interactions.
Privacy and Security
Your privacy matters. This online protractor processes all measurements and uploaded images entirely in your browser - nothing is sent to our servers. Your data stays on your device, ensuring complete privacy and security. No registration required, no tracking, no data collection. Use the tool with confidence knowing your work remains private.
Free and Accessible
This tool is completely free to use with no registration required, no advertisements, and no hidden costs. We believe in making educational and professional tools accessible to everyone. Use it as much as you need, for any purpose, whether personal, educational, or commercial.
Ready to Measure Angles?
Start using the online protractor now. Upload images, measure angles, and export your work - all for free.