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Message format

This reference article describes message and image formats for iOS, Android, and Windows push notifications.

iOS

  • Message Length:
    • iOS Lock Screen: 110 Characters
    • iOS Notification Center: 110 Characters
    • iOS Banner Alert: 62 Characters
    • iOS Pop Up Alert: 235 Characters
  • Payload Size:
    • iOS: 2KB
  • Number of Lines:
    • iOS Lock Screen: 4 Lines
    • iOS Notification Center: 4 Lines
    • iOS Banner Alert: 2 Lines
    • iOS Pop Up Alert: 8 Lines
  • Customizable UI: No
  • Deep Link Capable: Yes
Aspect Ratio Recommended Image Size Maximum Image Size File Types
2:1 (recommended) 500KB 5MB PNG, JPG, GIF

iOS push notification with text that reads: "Hi! This is an iOS Push".

iOS push notification with text that reads: "Hi! This is an iOS Push with an image" with an emoji. There is a small image beside the text. iOS push notification on a hard push with the same text as the previous message with an expanded image preceding the text.

Android

  • Message Length:
    • Lock Screen: 1 line (estimated 49 characters max)
    • Notification Drawer: 1 line, up to 8 lines when expanded (estimated 597 characters max)
  • Payload Size:
    • FCM: 4KB
  • Customizable UI: Yes
  • Deep Link Capable: Yes

Push icon

Aspect Ratio Recommended Image Size Maximum Image Size File Types
1:1 (400x400 pixels minimum) 500KB N/A - however a balance should be struck between quality and size PNG, JPG

Expanded notification image

Aspect Ratio Recommended Image Size Maximum Image Size File Types
2:1 (600x300 pixels minimum) 500KB N/A - however a balance should be struck between quality and size PNG, JPG

Android push notification displayed on the home screen.

Android push notification with a large image under the message text.

Windows Universal

  • Message Length: Depends on Device
  • Payload Size: 3 kilobytes
  • Number of lines: 1-3 Lines
  • Customizable UI: No
  • Deep Link Capable: No

Windows Universal push notification that reads: "Hey! This is a Windows Universal toast".

Windows Phone 8

  • Message Length: Varies. If only title is set, about 40 characters can be displayed. If only content is set, about 47 characters can be displayed. If title and content is set, then about 41 characters can be displayed.
  • Payload Size: 5 kilobytes
  • Number of lines: 1
  • Customizable UI: No
  • Deep Link Capable: No

Windows Phone 8 push notification that reads: "Hey! This is a Windows Phone 8 Toast".

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