free-ruler ☆

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Description:
Horizontal and vertical rulers

Type: Cask | Latest Version: 2.0.8@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: measurement design-tools productivity developer-tools screen-ruler

Install: brew install --cask free-ruler

About:
Free Ruler is a precise measurement utility designed for macOS that provides both horizontal and vertical on-screen rulers. It allows users to measure objects, windows, and screen elements in pixels, inches, centimeters, or points with high accuracy. The tool is invaluable for designers and developers who need to verify dimensions and spacing directly on their screen.

Key Features:

Dual-axis measurement (horizontal and vertical rulers simultaneously)
Multiple unit support (pixels, inches, centimeters, points)
Always-on-top functionality for continuous measurement
Pixel-perfect precision for UI and design work
Lightweight and native macOS application

Use Cases:

UI/UX designers measuring element spacing and dimensions
Web developers verifying pixel-perfect layouts and alignments
Graphic designers checking print layouts on screen

Alternatives:

PixelSnap – More expensive with auto-measurement features
xScope – Comprehensive design tools suite, steeper learning curve
Built-in macOS Screenshot tool – Free but lacks continuous measurement capabilities

Version History

Detected	Version	Rev	Change	Commit
Sep 15, 2025 11:39am	2.0.8	0	VERSION_BUMP	22fd1949