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.
See also:UI/UX Design
Open-source UI design and prototyping for product teams
Stars
59,062Last commit
11 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:
Design editor that opens Figma files, runs AI, and stays local
Stars
7,945Last commit
11 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:
Visual app builder that integrates with your existing codebase
Stars
6,968Last commit
21 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:
Security-first diagramming with no login required
Stars
7,662Last commit
2 days 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:
Open canvas for designing and building web apps
Stars
2,619Last commit
3 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
2,686Last commit
13 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:
c15t – Open-source cookie banner, built for control and lightening fast modern web apps.
CodeRabbit