pencil ☆

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Description:
GUI prototyping tool

Type: Cask | Latest Version: 3.1.1@0 | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: prototyping wireframing ui-design mockup gui

Install: brew install --cask pencil

About:
Pencil is an open-source GUI prototyping tool that allows designers and developers to quickly create wireframes and mockups. It features a built-in collection of SVG-based stencil collections for various platforms, including desktop, mobile, and web. The tool supports the creation of interactive prototypes with linking between pages, facilitating the visualization of user flow and application structure.

Key Features:

Cross-platform stencil collections for rapid UI design
Interactive prototyping with inter-page linking
Export options to PDF, PNG, SVG, and OpenDocument formats
WYSIWYG diagramming with native look and feel

Use Cases:

Creating low-fidelity wireframes for early-stage product design
Demonstrating user navigation flows to stakeholders
Mocking up desktop or mobile application interfaces

Alternatives:

Balsamiq – Balsamiq offers a distinct hand-drawn sketch aesthetic but is proprietary and paid.
Figma – Figma is a cloud-based, high-fidelity design tool with real-time collaboration, requiring a subscription for full features.

Version History

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