100% client-side web tool to resize screenshots, generate app icons, and create image sets for App Store Connect (iOS) and Google Play. No server, no uploads.
App Store Resizer is a privacy-first developer tool that runs entirely in the browser. All image processing happens locally using the Canvas API — no images are ever sent to a server. It was built to solve a real pain point: preparing screenshots and icons for App Store Connect and Google Play requires specific sizes for dozens of device types, which is tedious to do manually. The tool automates this completely, from a single source image to a ready-to-submit ZIP.
All processing in-browser via Canvas API. No uploads, no servers, full privacy.
Visually adjust crop for each device size before exporting.
Detects the best platform and resolution match for your input image.
Download all assets in one organized ZIP, ready for Xcode or Android Studio.
iPhone, iPad, Apple Watch Ultra, macOS icons and App Store screenshots.
mdpi to xxxhdpi launcher icons, Play Store banner and all screen sizes.
3 screenshots — click to expand