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
61,546Last commit
10 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
27,700Last commit
6 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
Stars growing over the last 30 days9,221Last commit
9 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
Stars growing over the last 30 days8,949Last 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
7,126Last commit
6 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
4,017Last 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
2,688Last commit
5 days 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
2,747Last commit
12 days 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:
Bright Data – Web data for AI agents and apps. Built-in unblocking, proxies, and ready-made APIs.
Windshift