Introduction
The WebUSB API enables web applications to interact directly with USB devices, allowing for seamless data transfer and hardware control from within a browser. This technology eliminates the need for dedicated software, making USB-based applications more accessible.
How WebUSB API Works
- Device Access – When a user connects a USB device, a web application can request permission to access it. The user must approve this via a browser prompt.
- Data Transfer – Once access is granted, JavaScript can send and receive data in real-time, enabling direct communication between the browser and the device.
Real-World Example: GrapheneOS WebUSB-Based Installer
GrapheneOS, a security-focused Android-based operating system, uses WebUSB to simplify the OS installation process directly from a browser. This eliminates the need for command-line tools, making installation user-friendly.
Browser Support
WebUSB API is supported in Chromium-based browsers like Chrome and Edge. However, it is not available in Firefox or Safari.
🔗 Check browser support on Can I Use
Advantages of WebUSB API
- No need for additional software or drivers
- Works across different platforms (Windows, Linux, macOS, ChromeOS)
- Simplifies access to USB hardware via the web
💡 Conclusion: The WebUSB API makes web-based USB communication possible, unlocking a wide range of use cases—from firmware flashing tools to device management interfaces.
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