Documents that
run like apps
Capsule packs your entire app — UI, data, and everything — into a single portable .capsule file. No cloud. No accounts. Just share it.
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 what you need
Describe the application, layout, or features you want to build.
Self-contained output
Generates a complete single-file .capsule container with HTML UI, schema, and local SQLite data.
Live AI updates
Modify features, dark mode, or schemas on the fly via direct AI prompts or MCP coding tools.
Choose an AI assistant below to start building your app.
Create a Shareable File for Your Personal App
Capsule brings the simplicity of documents together with the power of native desktop and mobile applications.
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.
Send interactive trackers, portfolios, or tools in standard message threads. Tapping open works immediately.
Capsules use standard HTML and CSS. Your code and data belong to you, entirely free of cloud silos.
100% Private by Design
Capsule keeps your personal data where it belongs, on your device. Everything you create is saved directly into the file, giving you complete ownership with zero cloud servers.
Write tasks, list recipe notes, or save project logs. There is no cloud storage, no account registration, and no network requirement. Everything is secured right inside the file.
Works 100% offline. Access your apps on a plane, on the subway, or completely disconnected.
Data stays safely packed inside the single file. Absolute protection from server breaches.
One File, Every Operating System
Capsule files are completely cross-platform by default. Open the exact same file on macOS, Windows, or Linux without conversion or special setup.
Your apps launch with full desktop performance on any computer, with native iOS and Android support coming soon.
Launches seamlessly on macOS, Windows, and Linux with zero setup or configuration.
Open and run the exact same .capsule files on iOS and Android devices.
Ready to run portable apps?
Capsule is completely free. Download the host player for your platform and open any .capsule file in seconds.