Web Bluetooth API

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Web Bluetooth API provides the ability to connect and interact with Bluetooth Low Energy peripherals.

Note: This API is not available in Web Workers (not exposed via WorkerNavigator).



Provides methods to query Bluetooth availability and request access to devices.


Provides properties of a particular BluetoothRemoteGATTCharacteristic.


Represents a Bluetooth device inside a particular script execution environment.


Represents a GATT Characteristic, which is a basic data element that provides further information about a peripheral's service.


Represents a GATT Descriptor, which provides further information about a characteristic's value.


Represents a GATT Server on a remote device.


Represents a service provided by a GATT server, including a device, a list of referenced services, and a list of the characteristics of this service.

Extensions to other interfaces

The Bluetooth API extends the following APIs, adding the listed features.

Returns a Bluetooth object for the current document, providing access to Web Bluetooth API functionality.

Security considerations

The Web Bluetooth API can only be used in a secure context.

Access to the API is controlled by the Permissions Policy directive bluetooth. The default allowlist for the bluetooth policy is self, which enables Bluetooth usage in same-origin nested frames but prevents access by third-party content by default. Cross-origin access is enabled by specifying the allowed origins in both the Permissions-Policy: bluetooth HTTP header and the desired <iframe>.

In order to use the feature the user must first grant explicit permission (they will not be prompted for access if it is not allowed for other reasons, such as being blocked by a Permissions Policy). The permission prompt is displayed when calling Bluetooth.requestDevice() to request access to a new Bluetooth device for which permission is not granted (the owning global object must also have transient activation). You can use Bluetooth.getDevices() to retrieve any devices that have previously been granted permission for the site.

The Permissions API navigator.permissions.query() method can be used with the bluetooth permission to test whether a site has permission to use Bluetooth devices. The permission state will be granted, denied or prompt (requires user acknowledgement of a prompt):

const btPermission = await navigator.permissions.query({ name: "bluetooth" });
if (btPermission.state !== "denied") {
  // Do something


Web Bluetooth
# bluetooth

Browser compatibility

BCD tables only load in the browser