# Storedeck

> Free, open-source editor for App Store, Google Play, Mac, Windows, Steam and TV store screenshots — with A/B test variants, localization and full AI-agent control through WebMCP.

Storedeck is a browser-based editor (https://storedeck.byanr.com/editor) for store screenshots. Projects contain A/B variants; each variant has platform decks (store + device + exact output size) with screens that hold copy and screenshots per language. Everything is stored locally in the browser. The editor exposes 22 WebMCP tools (document.modelContext), also callable as window.storedeck.callTool(name, input).

## Guides

- [App Store screenshot sizes and requirements (2026)](https://storedeck.byanr.com/guides/app-store-screenshot-sizes): Every App Store Connect screenshot size for iPhone, iPad, Mac, Apple TV, Vision Pro and Apple Watch — which ones are required, formats, limits and tips.

- [Google Play screenshot requirements: phones, tablets, Chromebook, TV and Wear OS](https://storedeck.byanr.com/guides/google-play-screenshot-requirements): Google Play screenshot sizes, aspect-ratio rules, promotion eligibility, feature graphic and TV banner specs — with ready-made sizes for every device type.

- [A/B testing App Store and Google Play screenshots](https://storedeck.byanr.com/guides/ab-testing-store-screenshots): How to run screenshot experiments with App Store Product Page Optimization and Google Play store listing experiments — what to test, how long, and how to prepare variants.

- [How to localize App Store and Google Play screenshots](https://storedeck.byanr.com/guides/localize-app-store-screenshots): A practical workflow for localized store screenshots: which languages to start with, file naming, long German words, RTL Arabic and Hebrew, CJK line breaks and fonts.

- [TV app screenshots: Apple TV, Android TV, Fire TV and Xbox](https://storedeck.byanr.com/guides/tv-app-store-screenshots): Screenshot sizes and design tips for TV storefronts — Apple TV (tvOS), Android TV / Google TV, Amazon Fire TV, Xbox and smart TV stores.

- [Desktop store screenshots: Mac App Store, Microsoft Store and Steam](https://storedeck.byanr.com/guides/desktop-app-store-screenshots): Screenshot sizes and layout advice for desktop storefronts — Mac App Store (16:10), Microsoft Store (up to 4K), Steam screenshots and capsule art, and Chromebooks.

- [Writing store screenshot headlines that convert](https://storedeck.byanr.com/guides/screenshot-copywriting): A practical playbook for App Store and Google Play screenshot copy: the first-three rule, benefit-first headlines, sequencing, readability and what to avoid.

- [Automate store screenshots with AI agents (WebMCP)](https://storedeck.byanr.com/guides/automate-store-screenshots-with-ai-agents): Let Claude, ChatGPT or any WebMCP-capable agent design, localize, A/B test and export your App Store and Google Play screenshots with Storedeck's 22 site tools.

## Screenshot sizes

- [Apple App Store screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/app-store): iPhone, iPad, Mac, Apple TV, Apple Vision Pro, Apple Watch

- [Google Play screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/google-play): Android phone, 7-inch tablet, 10-inch tablet, Chromebook, Android TV / Google TV, Wear OS, Android XR, Android Automotive, Play artwork

- [Microsoft Store screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/microsoft-store): Windows desktop, Xbox

- [Steam screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/steam): Steam screenshots, Steam capsules

- [Amazon Appstore screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/amazon-appstore): Fire TV, Fire tablet

- [Smart TV stores screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/tv-stores): Smart TV (16:9)

- [Web & social screenshot sizes](https://storedeck.byanr.com/screenshot-sizes/web): Web & social

## For AI agents

- [WebMCP tool reference](https://storedeck.byanr.com/agents): all 22 tools with parameters

- [Full text for LLMs](https://storedeck.byanr.com/llms-full.txt): every guide, the size catalog and tool JSON schemas

- [FAQ](https://storedeck.byanr.com/faq)

## Optional

- [Source code (MIT)](https://github.com/Nikhil1920/storedeck)