Free browser tool
Check App Store and Google Play Screenshot Sizes
Drop PNG or JPEG files to check pixel dimensions, format, PNG alpha data, exact Apple display slots, and Google Play rules. No signup and no upload.
What the screenshot checker validates
| Check | Apple App Store | Google Play |
|---|---|---|
| Pixel size | Exact match against accepted iPhone, iPad, Mac, TV, Vision Pro, and Watch slots | Both sides 320–3840 px; long side no more than 2× short side |
| Format | JPEG/JPG or PNG | JPEG or 24-bit PNG |
| Alpha data | No alpha channel or transparency | No alpha/transparency |
| Recommended output | Shows the exact matching slot | Identifies 1080p 9:16/16:9 assets |
How local file inspection works
The tool reads image headers and dimensions through browser APIs on your device. For PNG files, it checks the PNG color type and transparency chunk: this catches alpha-capable PNGs even when their visible background looks opaque. The file does not leave the browser tab and AppShotSet does not retain a copy.
Closing or refreshing the page clears the results. Browser-side validation cannot judge whether store-listing content is accurate, whether the screenshot count matches every supported device type, or whether an image violates a store’s content policy.
Understanding an Apple slot match
Apple requires exact pixel dimensions for the selected App Store Connect display slot. A file can be a technically valid image while not matching any Apple screenshot size. The checker reports every slot that accepts the dimensions in portrait or landscape.
A matching iPhone slot does not satisfy an iPad requirement when the app supports iPad. See the complete App Store size guide for the minimum-set strategy and App Store Connect scaling behavior.
Understanding Google Play results
“Valid · minimum rules” means the individual file passes Google’s format, dimensional, ratio, and alpha checks. It does not mean the whole listing qualifies for screenshot-led recommendation formats. For that, apps should provide at least four screenshots with a minimum 1080 px resolution at 9:16 portrait or 16:9 landscape.
The Google Play size guide separates publishing requirements from the recommended discovery standard.
Why a valid file can still be rejected
- The batch contains too many or too few screenshots.
- The asset is uploaded to a different device slot.
- The app supports a device family without a required set.
- The visible content violates store policies or misrepresents the app.
- Play Console requires additional device-specific preview assets for the selected release.
Official sources
Specifications are checked monthly and after major store or device changes.