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Show HN: Capsule – Single-file web apps that save their data into SQLite

Hey HN,I always had the problem that building HTML pages is really simple now, but trying to save data required hosting it somewhere, and sharing it afterwards was not easy. Over the last few months, I've been building an app called Capsule (it’s also the file extension name) written in Rust with Tauri 2.0 that allows packing an HTML app and its data into a single SQLite file.The HTML file and any related assets are directly embedded in the database. User data can either be saved as a localStora

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tech4you AI
September 16, 20261 min read
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01 / PORTABILITY

What If an App Was Just a Document?

Forget cloud accounts, servers, and subscriptions. Capsule bundles your user interface, media assets, and local database into a single, portable .capsule file.

Send it via WhatsApp, AirDrop, or email just like a PDF or Word document. When the recipient taps the file, it launches instantly with all your data preloaded, ready to use.

💬
Share Apps in Chat

Send interactive trackers, portfolios, or tools in standard message threads. Tapping open works immediately.

🎨
Zero Vendor Lock-in

Capsules use standard HTML and CSS. Your code and data belong to you, entirely free of cloud silos.


Originally published on Hacker News (Best)

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Show HN: Capsule – Single-file web apps that save their data into SQLite | tech4you