Message format
This reference article describes message and image formats for iOS and Android 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: 2 KB
- 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) | 500 KB | 5 MB | PNG, JPG, GIF |
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: 4 KB
- Customizable UI: Yes
- Deep Link Capable: Yes
Push icon
Aspect Ratio | Recommended Image Size | Maximum Image Size | File Types |
---|---|---|---|
1:1 (400x400 pixels minimum) | 500 KB | 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) | 500 KB | N/A - however a balance should be struck between quality and size | PNG, JPG |
note:
Smaller, high quality images will load faster, so it’s recommended to use the smallest asset possible to achieve your desired output.
note:
Large image notifications display best when using an image of at least 600x300 pixels.