Quant-UX: Free Open Source Design & Prototyping Tool
Designing intuitive user experiences and testing them effectively usually requires expensive software or fragmented workflows. Quant-UX changes that. It’s a free, open-source design and prototyping tool that combines wireframing, testing, and analytics — all in a single platform.
Whether you're a solo designer, a product manager, or part of a UX research team, Quant-UX offers powerful tools to prototype interfaces and validate them through real user testing, without leaving your browser.
Watch our dedicated platform overview on our YouTube channel
Prototype Creation
Quant-UX allows you to rapidly create interactive prototypes without writing a single line of code. You can drag-and-drop UI elements, define screen flows, and link actions using intuitive event handlers.
From simple wireframes to near high-fidelity mockups, prototypes can simulate user interactions like clicks, transitions, and dynamic content changes — helping you validate ideas before development starts.
Design Editor
The built-in visual editor offers a clean, efficient workspace for crafting your UI designs. You can:
- Position elements using a flexbox-inspired layout system
- Use styles, fonts, and colors directly within the editor
- Create responsive layouts and scalable components
While it may not rival Figma or Adobe XD in graphic complexity, it covers 90% of prototyping needs — especially for UX testing.
Components
Quant-UX includes reusable components like:
- Buttons, inputs, sliders, and form controls
- Tab groups, accordions, and layout blocks
- Images, icons, and custom widgets
You can define your own components, reuse them across screens, and modify instances independently or globally — a powerful feature for building consistent interfaces.
Figma Import
Already working in Figma? No problem.
Quant-UX provides a Figma Import Plugin, enabling you to bring your Figma designs directly into the platform. It translates layouts and components, so you can instantly start adding interactions, logic, and user tests.
This makes Quant-UX a great complementary tool to your existing design stack.
Quant-UX Examples
To help you get started, Quant-UX includes several ready-made examples such as:
- Login flows
- E-commerce product pages
- Mobile app onboarding sequences
These examples are interactive and editable, offering a great learning base or inspiration for your own projects.
Test Prototypes
What sets Quant-UX apart is its integrated usability testing capabilities.
You can:
- Share a public link to your prototype
- Collect real-time interaction data from users
- Set tasks and measure how users complete them
No external test software needed — everything happens within the same tool.
Heatmap, User Journey, and Session Recording
Quant-UX gives you deep insight into user behavior through:
- Heatmaps showing click/tap intensity
- User journeys mapping how users navigate through your prototype
- Session recordings for playback and observation
These features are usually reserved for paid tools, but Quant-UX includes them natively and for free.
Detailed Analytics & Tasks
Set up custom tasks (e.g., “Find the checkout button”) and track:
- Completion rates
- Time on task
- Errors and backtracking
All results are presented in a clean dashboard with charts and logs — perfect for UX researchers and product teams who want evidence-based decisions.
Conclusion
Quant-UX is a rare gem in the UX world — an open-source tool that merges design, prototyping, and testing under one roof. Whether you're looking to build quick mockups, validate user flows, or gather real testing data, it provides a complete, cost-free solution.
If you're ready to replace your fragmented toolchain and embrace open-source UX design, give Quant-UX a try. Your users — and your budget — will thank you.