Added to in April 2026; requires manual flag activation. Apple Safari ❌ No Support
This modern web standard is revolutionizing how we interact with peripherals, allowing websites to communicate with serial devices (like Arduino, ESP32, or legacy hardware) directly via JavaScript. However, as with any cutting-edge web technology, the elephant in the room is browser compatibility. web serial api browser support
| Browser | Supported? | Minimum Version | Notes | | :--- | :--- | :--- | :--- | | | ✅ Yes | 89 | Full support on Desktop. | | Edge | ✅ Yes | 89 | Full support on Desktop. | | Opera | ✅ Yes | 75 | Full support on Desktop. | | Brave | ✅ Yes | Recent | Supported as it follows Chromium. | | Firefox | ❌ No | N Added to in April 2026; requires manual flag activation
The answer is nuanced. While the API is powerful, its availability is not universal. This article provides a deep dive into which browsers support the API, which are working on it, which have explicitly rejected it, and how to build resilient applications that work across different environments. | Browser | Supported
Example fallback UI:
// Additional check for Android OTG capability if (/Android/i.test(navigator.userAgent)) return supported: true, note: "Requires OTG cable and USB host mode enabled." ;
Implement a :