Frequently asked questions
Answers about app icons, store screenshots, our free tools, and privacy. For step-by-step usage, see How it works. For in-depth guides, visit the Blog.
Getting started
- What is App Asset Generator?
- App Asset Generator is a free suite of browser-based tools for mobile developers and designers. You can generate every required app icon size for iOS and Android from one image, resize store screenshots to official App Store and Google Play dimensions, or batch-resize images to custom widths and heights. Everything runs in your browser; you do not need to install Photoshop, Sketch, or command-line utilities to produce store-ready assets.
- Do I need an account or payment?
- No. The tools are free to use without sign-up. We do not require a credit card. You upload files, we process them for the duration of the request, and you download a ZIP. See our Privacy Policy for how we handle data.
- Which file formats can I upload?
- For icons and screenshots, PNG and JPEG are the most common. Use high-resolution sources (ideally at least 1024×1024 for icons, and at least as large as your target store dimensions for screenshots) so downscaling stays sharp. Avoid tiny logos with thin strokes that disappear when scaled down.
App icons (iOS & Android)
- Why does Apple need so many icon sizes?
- iOS uses different icon sizes for the Home Screen, Spotlight search, Settings, notifications, and the App Store listing. Each context has a different physical size on screen, and Retina displays need 2x and 3x pixel densities. Xcode expects an Asset Catalog (AppIcon.appiconset) with a Contents.json file that maps each slot to the correct PNG. Generating this set by hand is tedious and easy to get wrong; one missing size can cause warnings or submission issues.
- What is the 1024×1024 icon for?
- Apple requires a 1024×1024 pixel icon for App Store Connect. That asset represents your app in the store. It should not use transparency (alpha channel)—Apple may reject icons with transparency. Your on-device icons are separate smaller sizes inside the Asset Catalog. Starting from one high-quality 1024×1024 square master and generating all variants keeps branding consistent.
- What are Android mipmap folders?
- Android places launcher icons in res/mipmap-* folders: mdpi, hdpi, xhdpi, xxhdpi, and xxxhdpi. Each density has a specific pixel size (for example, 48×48 at mdpi up to 192×192 at xxxhdpi). Many launchers also show a circular crop, so supplying a round icon variant (ic_launcher_round) in each folder improves appearance on devices that use circular icons.
- Should I add rounded corners to my icon file?
- For iOS, do not bake rounded corners into the master image—Apple applies the mask. For Android adaptive icons, follow Material guidelines if you use layers; for a simple full-bleed square source, our generator produces standard and round mipmap PNGs suitable for typical listings.
Screenshots (App Store & Google Play)
- Why was my screenshot rejected or scaled badly?
- Both Apple and Google require specific pixel dimensions per device class. If you upload the wrong size, the console may reject the file or scale it, which can blur text and UI. Always use the current official dimensions for each device family you support (for example, iPhone 6.7" vs 6.5" vs 5.5"). Our screenshot resizer outputs the standard set so each upload matches what the store expects.
- Can I resize several screenshots at once?
- Yes. Upload multiple images in the Screenshot tab. Each source image is resized to every required store size, and you receive a ZIP organized for download. That workflow is faster than exporting each size manually from a design tool.
- Do I need screenshots for every iPhone size Apple lists?
- You need screenshots for each device family your app supports, not necessarily every historical size. Apple groups requirements by display size. Check App Store Connect for your app’s required sets. When in doubt, generating the full standard set from our tool ensures you have files ready for the most common iPhone and iPad slots.
- What about Google Play phone vs tablet?
- Google Play asks for phone screenshots and, if applicable, 7" and 10" tablet shots. Dimensions have minimums and recommended ranges. Using sizes that match Google’s documentation avoids letterboxing and quality flags in the Play Console.
Custom resize & quality
- When should I use Custom Resize instead of the screenshot tool?
- Use the screenshot resizer when you need official App Store or Google Play dimensions. Use Custom Resize when you need arbitrary dimensions—for example, social images, thumbnails, or internal marketing assets. You can upload multiple files and set one width and height for all.
- Will resizing make my images blurry?
- Downscaling from a larger sharp source usually looks good. Upscaling a small image will not add real detail. For best results, export from your design tool at the largest size you might need, then let our tools downscale to each required size.
Privacy & technical
- Do you store my images?
- We process uploads to generate your ZIP and do not retain your files after the request completes. You do not need an account. Details are in our Privacy Policy.
- Can I use generated assets for commercial apps?
- Yes, subject to our Terms of Service. You must have the right to use any image you upload (your own design or properly licensed assets). We do not claim ownership of your uploads or outputs.
- Are store requirements always up to date?
- We aim to align with common App Store and Google Play dimension sets. Apple and Google occasionally update requirements. Before submission, verify critical dimensions in App Store Connect and Google Play Console if you are unsure.
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