App Asset Generator is a free web tool for app developers and designers. It helps you create all required icon and screenshot sizes for the Apple App Store and Google Play in one place, without installing software or creating an account. Whether you need a single 1024×1024 app icon, full Xcode Asset Catalog and Android mipmap sets, or store-ready screenshots for multiple device families, you can upload your assets and download everything in a few clicks.
What You Can Do
- App Icon Generator: Upload a single square image (e.g. 1024×1024 or larger) and download a ZIP containing iOS (Assets.xcassets/AppIcon.appiconset with Contents.json) and Android (mipmap folders for mdpi through xxxhdpi) icon sets. We also generate the round launcher icon variant for Android. Output is ready to drop into Xcode and Android Studio.
- Screenshot Resizer: Upload one or more images and get them resized to official App Store and Google Play screenshot dimensions for iPhone, iPad, and Android phone and tablet. Each image is output in all required sizes; download a single ZIP and upload to App Store Connect or Google Play Console.
- Custom Resize: Resize one or more images to any width and height. All resized images are packed into a ZIP. Useful for thumbnails, social graphics, or any custom dimension set.
Why Use App Asset Generator?
App stores require many icon and screenshot sizes, and getting dimensions wrong can lead to rejection or poor presentation. Manually resizing in an image editor is time-consuming and error-prone. App Asset Generator uses the correct dimensions and folder structure for each platform, so you can focus on building your app. The service is free, runs in the browser, and does not require sign-up—your images are processed on demand and not stored.
Privacy & Data
Your images are processed on our servers only for the duration of the request. We do not store your uploads or require an account. Generated files are streamed directly to you. For more detail, see our Privacy Policy and Terms of Service.
Blog & Guides
We publish guides and tips on app icon sizes, screenshot dimensions, and store requirements on our Blog. Topics include iOS and Android icon dimensions, App Store Connect and Google Play Console screenshot requirements, and how to use the tools effectively.
Who we build for
We focus on mobile app teams who ship to the Apple App Store and Google Play: indie developers without a full-time designer, small studios batching client releases, students learning Xcode and Android Studio, and anyone who has ever lost an afternoon exporting the same icon at twelve different pixel sizes. The goal is to remove repetitive asset work so you can spend time on product, not pixels.
Why a dedicated tool?
General-purpose image editors do not know Apple's Asset Catalog schema or Android's mipmap naming rules. Store consoles reject screenshots that are a few pixels off. App Asset Generator encodes those rules into the pipeline: upload once, download a ZIP that matches what Xcode and Android Studio expect. That is different from a generic "resize image" site—we aim to be accurate for store submission, not just smaller files.
Learn more
Step-by-step usage is on How it works. Common questions (icons, screenshots, privacy) are answered in the FAQ. Deeper articles on dimensions and workflows live on the Blog.
Contact
For support or legal inquiries, you can reach us via the contact options listed on this site (e.g. contact form or email if provided). We do not list a physical address here for privacy; use the same channel for formal notices if needed.