First, install @capacitor/assets:

npm install @capacitor/assets --save-dev

Provide icon and splash screen source images using this folder/filename structure:

resources/
├── icon-only.png
├── icon-foreground.png
├── icon-background.png
├── splash.png
└── splash-dark.png

• Icon files should be at least 1024px x 1024px.
• Splash screen files should be at least 2732px x 2732px.
• The format can be jpg or png.

Then generate (which applies to your native projects or generates a PWA manifest file):

npx capacitor-assets generate

Alternatively, you can generate for a specific platform with --ios, --android or --pwa.

Android 12+​

In Android 12 and above Google changed the way Splash Screens are displayed, using a smaller icon with a colored background instead of a full screen image that was possible with Android 11 and below. Additional documentation about this change can be found at developer.android.com.