About App Store Screenshot Studio

A free, open-source studio that turns raw app screenshots into polished, multi-language App Store sets — built by an indie developer who got tired of doing it by hand.

Why it exists

App Store screenshots multiply brutally: 6 slides × iPhone + iPad × 9 languages is 108 pixel-exact PNGs, and every layout tweak regenerates all of them. Design tools treat each image as a one-off; screenshot SaaS tools want your images on their servers and a subscription. This studio takes a third path: one layout, captions as translatable data, per-language screenshots routed by filename, and a one-click export at exact App Store Connect sizes — running entirely in your browser.

Principles

• Client-side, always. No accounts, no upload — screenshots and projects stay in your browser. There is no backend at all (see the privacy policy).
• Open source under MIT. The full source is on GitHub; run it locally, fork it, file issues.
• Files as the interface. Captions import/export as CSV/JSON, projects import from a documented manifest, and a headless pipeline renders sets with no browser — so AI assistants and scripts are first-class users too.

Who builds it

Hyunsang Joo, an indie iOS developer shipping localized apps. The studio is the tool he uses for his own releases, which is why the workflow tracks what App Store Connect actually accepts — sizes, formats, and fastlane upload included. The longer build story is on the blog; the best way to reach the project is a GitHub issue.