Flock XR is a free, open-source tool for creating and exploring 3D worlds in the browser, designed for education and accessible on low-cost devices.
It enables educators, students, and families to build interactive 3D experiences without downloads or logins, making it easy to use in classrooms, clubs, and at home.
- No login required
- Runs entirely in the browser (including Chromebooks, tablets, and low-spec devices)
- Designed for schools, clubs, and home learning
- Supported by curriculum resources and ready-to-use lesson materials
Flock XR has been designed as a bridge between Scratch and professional 3D tools, such as Babylon JS, UEFN, Unity and Godot.
- Build and explore interactive 3D environments
- Create worlds using visual gizmos and block-based coding
- Teach coding, game design, and digital storytelling through hands-on projects
- Run engaging learning activities without installing software
- Teachers and educators worldwide
- Students (primary through secondary education)
- Clubs, coding groups, and informal learning communities
- Parents and home educators supporting creative learning
👉 Try it now: app.flockxr.com A project from: Flip Computing.
The development of Flock XR is supported by grants from Nlnet Foundation, UK Games Fund, and MediaCity Immersive Technologies Innovation Hub.
We are looking for funding to take Flock XR further so please get in touch if you can help.
Please see our documentation hub and free resources for clubs.
Full details of Flock XR versions including the latest Development version can be found at flockxr.com/versions/
You will also find full dev setup for contributing to Flock XR in our guide.
Flock XR is licensed under the MIT License. By contributing, you agree that your contributions will be licensed under the same license.
Flock XR is based on Blockly, the Babylon JS library and the Havok physics engine. Most 3D assets have been created within the project using Blender, with some audio from Kenney.nl.
- JavaScript (considering TypeScript migration)
- Babylon.js - 3D rendering engine
- Google Blockly - Visual programming blocks
- Vite - Build tool
- Node.js - Development environment
- Progressive Web App features
- Mocha & Chai - Unit testing framework
- Playwright - End-to-end testing framework
This project includes automated tools for tracking and improving API documentation and test coverage.
📚 Documentation:
- API Quality Tools Guide ⭐ - Complete guide to using the tools
- Getting Started - Quick start for improving API quality
- API Strategy - Overall approach and goals
- Current Status - Metrics and progress tracking
🔧 Key Commands:
# Check API documentation and test coverage
npm run docs:coverage
# Run API tests (automated, headless)
npm run test:api @notslow # All fast tests (100 tests)
npm run test:api babylon # Specific test suite
npm run test:api @onlyslow # All slow tests (94 tests)📊 Current Metrics:
- 108 total API methods
- 48% documented in API.md (52 methods)
- 49% tested (53 methods)
- 226 total tests across 15 test files