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Best Protractor â Screen Protractor Alternatives ranked by AI · updated Aug 2026

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Screen Protractor is a Windows desktop utility for measuring angles directly over applications, images, and web pages. It provides an adjustable on-screen protractor for designers, engineers, students, and anyone comparing visual angles.

Developer: Iconico Price: From $29.50 🎯 sourceforge.net/projects/osprotractor

💻 Windows Utility protractor screen measurement

Top 6 Protractor â Screen Protractor alternatives

1

MB-Ruler

Markus Bader

💡 Pick it for a free Windows toolkit with rulers, grids, coordinates, and angle measurement.

MB-Ruler is a Windows screen-measurement toolkit with rulers, grids, guides, coordinates, and angle measurement. It is aimed at designers, developers, and technical...

Pros

Adds rulers, grids, guides, and coordinates beyond angle measurement
More configurable than Screen Protractor
Works well for detailed pixel and layout inspection

Cons

More cluttered and complex than a dedicated protractor
Windows-only
Older interface than many modern measurement tools

Free

Alternatives to MB-Ruler → Visit site

2

PixelStick

💡 Pick it if you use macOS and want angle, distance, color, and coordinate tools in one overlay.

PixelStick is a tool for measuring distances, angles, and colors on the screen. It is commonly used by designers and developers for...

$29.99

Alternatives to PixelStick → Visit site

3

JR Screen Ruler

💡 Pick it for a no-cost Windows ruler and protractor with a small footprint.

JR Screen Ruler is a virtual ruler to measure objects on your screen. It is a simple and easy-to-use tool for designers...

Free

Alternatives to JR Screen Ruler → Visit site

4

Meazure

💡 Pick it if you want an open-source Windows measurement tool instead of a paid standalone protractor.

Meazure is a comprehensive software tool for measuring and analyzing various aspects of software development projects.

Contact for pricing

Alternatives to Meazure → Visit site

5

ImageJ

National Institutes of Health

💡 Pick it for calibrated, repeatable angle measurements inside images rather than quick live-screen checks.

ImageJ is an open-source image analysis platform that can measure and extract information from plot images using built-in tools and plugins. It...

Pros

Free, open source, and available across major desktop platforms
Powerful image preprocessing can improve extraction from poor scans
Extensible through plugins and macros for repeatable workflows

Cons

Requires plugins or manual setup for convenient plot digitization
Less purpose-built and slower to learn than dedicated digitizers
Axis calibration and curve extraction are not as streamlined

Free

Alternatives to ImageJ → Visit site

6

Ginifab Angle Measure

Ginifab

💡 Pick it for a free browser-based protractor when installing desktop software is unnecessary.

Ginifab Angle Measure is a browser-based protractor for measuring angles interactively on a web page. It is suited to students, teachers, and...

Pros

Works in a browser without installation
Accessible from most desktop operating systems
Fast for simple educational and visual measurements

Cons

Less convenient over other applications than a desktop overlay
Fewer precision and calibration features than dedicated utilities
Depends on browser access

Free

Alternatives to Ginifab Angle Meas... → Visit site

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