6 Best Open Source Pencil Alternatives
A curated collection of the 6 best open source and self-hosted alternatives to Pencil in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Pencil in 2026? The top open-source alternative is Penpot — Open-source design platform for teams.
Other highly rated open-source Pencil alternatives include Graphite, OpenPencil and Grida.
Open-source design platform for teams
Penpot is the open-source design platform for teams building digital products at scale, enabling deeper collaboration across design, code, and AI workflows. - Full-stack design: Create responsive interfaces with wireframes, prototypes, and CSS Grid/Flex layouts - Design systems: Build scalable visual frameworks with components, design tokens, and shared libraries - AI workflows: Integrate any LLM or AI tooling directly into Penpot for code-to-design and design-to-code workflows - Code inspection: Work with open standards like CSS, HTML, SVG, and JSON with matching design-to-code output - Real-time collaboration: Design, review, and iterate together with team members in real-time - Self-hosting: Deploy Penpot on your own infrastructure for full data control - Cross-platform: Browser-based with no installation required, works on any device Penpot is built with Clojure and runs as a web application that can be self-hosted using Docker or Kubernetes. The platform supports PostgreSQL for data storage and Redis for caching. Self-hosting documentation is available at penpot.app/self-host.
A free, open source vector graphics editor built around nondestructive, node-based design. Runs locally in the browser, exports SVG, PNG, and JPG.
A free, open source vector graphics editor built around nondestructive, node-based design. Runs locally in the browser, exports SVG, PNG, and JPG.
Open-source Figma alternative with AI tools
OpenPencil is a free, open-source design editor that opens Figma files natively while providing built-in AI tools and full programmability. It serves as both a standalone application and a toolkit for building custom editors. - Figma-Compatible: Opens .fig files natively with round-trip fidelity using Kiwi binary codec. Supports copy & paste between Figma and OpenPencil. - Programmable: Headless CLI for inspecting, exporting, and analyzing .fig files. Supports Figma Plugin API via eval, Tailwind CSS export, and JSON output for CI/automation. - Toolkit Approach: Build custom editing surfaces with the Vue SDK, embed OpenPencil into other products, or create workflow-specific editors around the same core. - AI-Native: Built-in chat with 90 tools for creating shapes, setting styles, managing layouts, and analyzing tokens. Includes MCP server for integration with Claude Code, Cursor, and Windsurf. - Open Source: Released under MIT license with full transparency—edit the editor, engine, file codec, and CLI. - Free & Local: No account, server, or internet required. Available as a ~7MB desktop app via Homebrew or as a web app. - Real-Time Collaboration: Peer-to-peer collaboration via WebRTC with live cursors and follow mode—no server needed. OpenPencil is designed for local-first usage with optional real-time collaboration. The desktop app is available via Homebrew, and the web app can be self-hosted. The entire stack is open-source under the MIT license, allowing for full customization and self-hosting capabilities.
Free open canvas for designing web apps
Grida is a free, open canvas designed for building and designing web applications with ease. Whether you're creating pixel art, UI/UX designs, or full-fledged web apps, Grida provides a versatile editor with customizable templates, AI-powered prompts, and seamless file export. - Free & Open Canvas: Design and build web applications with customizable templates and components. - AI-Powered Tools: Leverage AI for copywriting, design suggestions, and automation. - React Component Integration: Use Grida as a React component or integrate your own components. - Modular SDK: Build custom tools and extensions with Grida's modular SDK. - Optimized Performance: Powered by Rust and WebGPU for high performance. - Widgets & Templates: Drag-and-drop widgets and icons for quick UI building. - Scripting Interface: Create design automations and plugins with a runtime scripting interface. - Figma Integration: Import and export designs seamlessly with Figma. - Enterprise Solutions: Custom, on-premise solutions for businesses. Grida is open-source and can be self-hosted. It supports modular SDKs, React components, and is optimized for performance with Rust and WebGPU. The platform is designed for extensibility and customization, making it suitable for both individual developers and enterprises.
Open source UX design and user testing tool
Quant-UX is a comprehensive, open-source tool for UX design and user research. It combines prototyping, user testing, and analytics into a single platform, enabling designers and researchers to quickly validate ideas and gather actionable insights. - Visual Prototyping: Create interactive prototypes with a drag-and-drop editor, animations, logic flows, and form validation. Build scalable design systems using components and master screens. - User Testing: Conduct usability tests by sharing a link with your audience. Define tasks, record screen sessions, and perform A/B testing to compare different prototype versions. - Automated Analytics: Generate heatmaps, success rates, drop-off analysis, and task completion metrics automatically. Embed surveys to collect direct user feedback. - AI Assistant: Enhance workflows with an AI assistant that simplifies repetitive tasks and accelerates prototyping. - Cross-Platform Testing: Test prototypes on mobile devices using QR codes or direct links, ensuring seamless user experience across devices. - Data-Driven Insights: Automatically compute KPIs and visualize insights in an intuitive analytics canvas for informed decision-making. Quant-UX is open-source and can be self-hosted for full control over data and infrastructure. The project is built with modern web technologies and supports deployment on various platforms. For more details, visit the GitHub repository.
Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in.
Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in.
About Pencil
pen.dev – Design on canvas. Land in code.
pen.dev fundamentally increases your engineering speed by bringing designing directly into your preferred IDE. It bridges the gap between design and development, allowing teams to collaborate in real-time with AI assistance.
Key Features of Pencil
- Infinite Design Canvas: Design products with pixel-perfect precision without leaving your IDE. Code and design are always just one tab-click apart.
- AI Multiplayer: Collaborate with AI agents to generate screens or entire flows in parallel, exploring new directions faster than ever.
- Vibe Designing with Precision: Prompt entire screens or specific parts directly in context using curated actions or custom prompts.
- From Vectors to Code: Ship production-ready apps where code stays true to the design. Pixel-perfect context keeps everything aligned.
- Curated Design Kits: Leverage component-based design kits or plug in your team’s existing design system straight from the codebase.
- Fully Open File Format: Read, debug, or extend design files with your own tools. No black box, no lock-in.
- Figma Integration: Copy and paste designs directly from Figma. Vectors, text, and styles come over intact.
- Design as Code: Design files live in your repo. Version, branch, and merge with Git just like you do in development.
- MCP Vector Canvas: Full bi-directional MCP vector canvas with write access, enabling integration with databases, APIs, and other agents.
Tech / Self-Hosting
pen.dev is a cloud-based tool with IDE extensions for Cursor, VSCode, and Claude Code. It supports open file formats and integrates with Git for version control. While primarily cloud-hosted, the open file format allows for potential self-hosting or local storage of design files.