Open Source UI/UX Design Tools using CSS
A curated collection of the best open source software for creating user interfaces, user experiences, and prototypes. using CSS.
Open-source UI design and prototyping for product teams
Stars
61,407Last commit
6 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
Stars growing over the last 30 days9,135Last commit
12 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
7,120Last commit
8 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:
Open canvas for designing and building web apps
Stars
2,687Last commit
1 day 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
2,741Last commit
9 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:
c15t – Open-source cookie banner, built for control and lightening fast modern web apps.
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