Show HN: Capsule – Single-file web apps that save their data into SQLite
Capsule is a new tool that allows users to create self-contained, single-file web applications that include UI, data, and SQLite databases. By eliminating the need for cloud servers or accounts, it enables users to share functional apps as easily as documents.
Why it matters
It represents a shift toward local-first software, prioritizing user data ownership and portability over cloud-dependent ecosystems.
Capsule packs your entire app — UI, data, and everything — into a single portable .capsule file. No cloud. No accounts. Just share it.
Download for macOS Try Web Preview Download for other platforms ↓ Summer Recipes.capsule Shared via WhatsApp Chloe Summer Recipes.capsule Try Recipe Book .capsule in Web Preview → AI APP GENERATION Generate & update apps using AI Capsule turns simple prompts into complete, self-contained desktop applications. No cloud servers, no databases to configure, no complex build setups.
Describe the application, layout, or features you want to build.
Generates a complete single-file .capsule container with HTML UI, schema, and local SQLite data.
Modify features, dark mode, or schemas on the fly via direct AI prompts or MCP coding tools.
Live Preview ✦ Waiting for prompt... ✨ Build your app with your favorite AI assistant Choose an AI assistant below to start building your app.
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