# App icon generator

> One image in, every size out. iOS, macOS, Android, watchOS and web, with the config files written for you.

Turn one square image into every app icon size iOS, macOS, Android, watchOS and the web need, with Contents.json and the Android XML written for you. Runs in the browser, nothing is uploaded.

- Price: Free, no account
- Where it runs: Entirely in your browser. Nothing is uploaded

## How to generate app icons from one image

1. **Drop in your artwork** — One square image, 1024x1024 or larger, so every size is scaled down rather than stretched up.
2. **Pick the platforms you need** — iOS, macOS, Android, watchOS and web. Every set comes with its config files written for you.
3. **Set a background if it needs flattening** — The App Store rejects icons with transparency, so choose the colour that fills it.
4. **Download the zip** — Every size, plus Contents.json and the Android XML, assembled in your browser.

## People look for this as

- app icon generator
- ios app icon sizes
- android adaptive icon generator
- appiconset generator
- favicon generator

## Related reading

- [Every app icon size for iOS, macOS, Android and Chrome, one cheat sheet](https://ziyarex.com/journal/app-icon-sizes-cheat-sheet): The full list, per platform, with the rules that get builds rejected: alpha channels, safe zones and the corners you must not round yourself.
- [App Store screenshot sizes that still get accepted in 2026](https://ziyarex.com/journal/app-store-screenshot-sizes): Apple rejects wrong pixel dimensions outright, with an error that doesn't say which one. The exact numbers for iPhone, iPad, Mac, Watch, TV and Play.
- [Notarisation and the six things that get a Mac app rejected](https://ziyarex.com/journal/mac-app-notarisation-rejections): Notarisation is an automated check, which means every failure has an exact cause and an exact fix. The six that account for nearly all of them.

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