FreeCollageImage: Photo collages made in your browser — nothing ever uploaded

I built this because every free collage tool wanted me to upload family photos to a server, make an account, or accept a watermark on the result. For holiday pictures that felt like a bad trade, so I made one where the photos simply never leave the device. The hardest part wasn't the editor, it was saving. An anchor with the download attribute pointing at a data URL does absolutely nothing in an Android WebView or on iOS Safari — no error, no console warning, no file. The button was dead on phones for months and nobody reported it, because a button that does nothing reads as user error. Android needed a native plugin and iOS needed the Web Share API, with the base64-to-File conversion kept synchronous so it stays inside the user gesture. Honest limitations: on iOS you get a share sheet rather than a download, which is a compromise I'm still not happy about, and a browser handles very heavy photos less comfortably than a native app. There are also no artistic filters of the PicsArt kind. Happy to answer anything about the client-side approach or the Capacitor wrapper.