OpenPencil is a design editor that opens and writes Figma .fig files and Pencil .pen documents.
It is available as a lightweight Linux desktop application and can also run in a web browser as a progressive web app.
The software combines visual design tools with automation facilities, including a command-line interface, MCP server and headless Vue SDK. Its integrated AI assistant can create and modify designs using a choice of external AI providers.
This is free and open source software.
Key Features
- Reads and writes Figma `.fig` files and Pencil `.pen` documents.
- Creates reusable components, variants and component sets.
- Provides flexbox and CSS Grid-style automatic layout.
- Exports designs to PNG, JPG, WebP, SVG, HTML and JSX.
- Converts documents between supported design formats.
- Imports HTML, CSS and Tailwind layouts as editable designs.
- Includes an AI assistant with more than 100 design tools.
- Supports OpenAI, Anthropic, Google AI, OpenRouter and compatible providers.
- Offers peer-to-peer real-time collaboration over WebRTC.
- Includes cursors, presence indicators, viewport following and shared editing.
- Provides a command-line interface for inspecting, querying and modifying files.
- Supports XPath queries for locating nodes by type, property or structure.
- Lints documents for naming, layout, structural and accessibility problems.
- Analyses colours, typography, spacing, overlaps and repeated design patterns.
- Extracts design tokens and variables from existing documents.
- Exposes the Figma Plugin API for scripting design operations.
- Provides an MCP server for AI agents and development tools.
- Offers a headless Vue SDK for building customised design editors.
- Runs as a Tauri desktop application on Linux, macOS and Windows.
Website: github.com/open-pencil/open-pencil
Support:
Developer: Danila Poyarkov
License: MIT License
OpenPencil is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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