Professional cross-platform development tools for creating native Android, iOS, desktop, and server applications. Build once, deploy everywhere with simple BASIC-like syntax.
Everything you need for professional cross-platform development
Easy to learn, powerful to use. Write clean, readable code that compiles to native applications.
One codebase for Android, iOS, Windows, macOS, Linux, and Raspberry Pi applications.
Drag-and-drop UI designer with real-time preview for rapid application development.
Compiled to native code for maximum performance and efficiency on all platforms.
Extensive library collection covering databases, networking, UI components, and more.
Large, helpful community forum with thousands of examples and ready-to-use solutions.
Professional development tools for every platform
Quick start guide to create your first B4X application
Choose your target platform and download the IDE
Visit www.b4x.com
Download B4A, B4i, or B4J
Install and run the IDE
Start a new project with the project wizard
File -> New -> Project
Choose template
Configure package name
Select target SDK version
Use the visual designer to create your interface
Designer -> Add Views
Drag and drop components
Configure properties
Save layout
Add functionality and run on device or simulator
Write your BASIC code
Press F5 to compile
Test on connected device
Build release version