Source: https://docs.expo.dev/more/qr-codes

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Reference for the QR code generator at qr.expo.dev.

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qr.expo.dev is a cloud function that generates Expo-branded QR codes. This function creates QR codes for EAS Update , which are used to preview updates in development builds and Expo Go.

For example, if you and your team have a development build, and you'd like to load the latest update on a specific build's channel, you could go to the following endpoint to generate a QR code:

https://qr.expo.dev/eas-update?projectId=your-project-id&runtimeVersion=your-runtime-version&channel=your-channel

Which would produce the following QR code SVG:

This QR code represents the following URL:

exp+your-slug://expo-development-client/?url=https://u.expo.dev/your-project-id?runtime-version=your-runtime-version&channel-name=your-channel

This URL will deep link into a development build and instruct it to fetch the latest update on the specified channel.

If sharing the URL is more convenient, you can request the URL directly by adding format=url to the query parameters.

General

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The following parameters apply to the /eas-update endpoint.

Base query parameters

The following base query parameters can be included with any request to /eas-update.

| Param | Required | Default | Description | | --- | --- | --- | --- | | slug | No | exp | Use slug<br> from app config<br> to target a development build. Otherwise use "exp" to target Expo Go. | | appScheme (deprecated) | No | exp | Replaced by slug. Use slug instead. | | host | No | u.expo.dev | The hostname of the server that handles update requests. | | format | No | svg | Endpoints respond with SVGs by default. To receive a plain text URL, use url. |

Update by device traits

Preview and production builds make requests to the EAS Update service with runtimeVersion and channel properties. You can emulate this behavior with the following query parameters:

| Param | Required | Description | | --- | --- | --- | | projectId | Yes | The ID of the project | | runtimeVersion | Yes | The runtime version<br> of the build | | channel | Yes | The channel name of the build |

Example

https://qr.expo.dev/eas-update?projectId=your-project-id&runtimeVersion=your-runtime-version&channel=your-channel

Update by ID

You can create a QR code for a specific update given its platform-specific ID.

| Param | Required | Description | | --- | --- | --- | | updateId | Yes | The ID of the update |

Example

https://qr.expo.dev/eas-update?updateId=your-update-id

Update by group ID

You can create a QR code for an update group given the update's group ID.

| Param | Required | Description | | --- | --- | --- | | projectId | Yes | The ID of the project | | groupId | Yes | The ID of the update group |

Example

https://qr.expo.dev/eas-update?projectId=your-project-id&groupId=your-update-id

Update by branch ID

You can create a QR code with a branch's ID, which will return the latest update available on that branch.

| Param | Required | Description | | --- | --- | --- | | projectId | Yes | The ID of the project | | branchId | Yes | The ID of the branch |

Example

https://qr.expo.dev/eas-update?projectId=your-project-id&branchId=your-branch-id

Update by channel ID

You can create a QR code with a channel's ID, which will return the latest update available on the branch or branches that are mapped to that channel.

| Param | Required | Description | | --- | --- | --- | | projectId | Yes | The ID of the project | | channelId | Yes | The ID of the channel |

Example

https://qr.expo.dev/eas-update?projectId=your-project-id&channelId=your-channel-id