Open Source Design & Prototyping Tools
A curated collection of the best open source tools for designing interfaces and building interactive prototypes, covering wireframes, mockups, design systems, and developer handoff.
Open-source UI design and prototyping for product teams
Stars
60,651Last commit
15 hours agoLicense
MPL-2.0
Design, prototype, and hand off to developers in one platform. Supports design systems, tokens, flexible layouts, and AI workflows with real CSS/HTML output.
Open Source Alternative to:
Procedural vector editor that runs in your browser, no signup needed
Stars
27,422Last commit
9 hours agoLicense
Apache-2.0
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 Alternative to:
Design editor that opens Figma files, runs AI, and stays local
Stars
8,731Last commit
5 hours agoLicense
MIT
A Figma-compatible design editor with built-in AI chat, headless CLI, real-time P2P collaboration, and a Vue SDK for building custom editors. No account needed.
Open Source Alternative to:
Security-first diagramming with no login required
Stars
8,545Last commit
9 hours agoLicense
Apache-2.0
Create professional diagrams online or offline with security-first approach. No registration needed. Works with Google Drive, SharePoint, Atlassian, and more.
Open Source Alternative to:
Visual app builder that integrates with your existing codebase
Stars
7,065Last commit
19 hours agoLicense
MIT
Open-source visual editor for building websites and web apps. Connect to any data source, design custom UIs, and ship production React code without leaving your stack.
Open Source Alternative to:
Professional vector graphics editor for all skill levels
Stars
4,008Last commit
6 hours agoLicense
Other
Cross-platform vector graphics editor with flexible drawing tools, Bezier curves, powerful text handling, and broad file format support for illustrators and designers.
Open Source Alternative to:
Open canvas for designing and building web apps
Stars
2,654Last commit
7 hours agoLicense
Apache-2.0
Design and build web applications on an open canvas with AI-powered tools, Figma integration, pixel drawing, and a modular SDK built for extensibility.
Open Source Alternative to:
Design, prototype, and test user experiences with ease
Stars
2,728Last commit
6 hours agoLicense
GPL-3.0
Quant-UX is an open-source tool for creating interactive prototypes, conducting user tests, and analyzing results to improve UX design.
Open Source Alternative to:
Stellar Hosted – Managed Open Source software hosting in the EU: secure, compliant, fast.
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