← Device Access
Web Bluetooth
Probing…Web Bluetooth is a web platform capability in the Device Access category. Connect to Bluetooth LE devices and read/write GATT characteristics. Supported in Chromium 56+; not available in Firefox and Safari. Requires a secure context (HTTPS or localhost) and a user gesture such as a click or tap.
Secure contextUser gesture
Try it
Loading demo…
Code
const device = await navigator.bluetooth.requestDevice({
acceptAllDevices: true,
optionalServices: ['battery_service'],
})
const gatt = await device.gatt.connect()
const service = await gatt.getPrimaryService('battery_service')
const characteristic = await service.getCharacteristic('battery_level')
const value = await characteristic.readValue()
console.log('Battery:', value.getUint8(0), '%')Browser support
Chromium
56
Firefox
No
Safari
No
Frequently asked questions
Which browsers support Web Bluetooth?
Supported in Chromium 56+; not available in Firefox and Safari.
Does Web Bluetooth require HTTPS?
Yes. Web Bluetooth needs a secure context, so it only works over HTTPS (or on localhost during development).
What is Web Bluetooth used for?
Connect to Bluetooth LE devices and read/write GATT characteristics.
Can I try Web Bluetooth in my browser?
Yes. shwcs.net runs a live Web Bluetooth demo that probes your current browser and lets you try the API. Everything runs locally — nothing is sent anywhere.