Capsule — Documents that run like apps

Capsule Why Capsule? Templates Web Preview Download 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. 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. 01 / PROMPT YOUR IDEA Describe what you need Describe the application, layout, or features you want to build. 02 / INSTANT CAPSULE APP Self-contained output Generates a complete single-file .capsule container with HTML UI, schema, and local
SQLite data. 03 / ITERATE ON THE FLY Live AI updates Modify features, dark mode, or schemas on the fly via direct AI prompts or MCP coding
tools. AI Capsule Agent Ask the AI to modify the app... Live Preview ✦ Waiting for prompt... ✨ Build your app with your favorite AI assistant Choose an AI assistant below to start building your app. Build in ChatGPT Build in Claude Build in Gemini Other AI Assistants Why Capsule? Create a Shareable File for Your Personal App Capsule brings the simplicity of documents together with the power of native desktop and
mobile applications. 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. A Alex ● online Hey! Here's my latest design portfolio, with all projects, case studies, and
assets packed in. Let me know what you think 👀 10:14 AM ✦ Portfolio.capsule 3.2 MB · 24 Projects Tap to Run Opening it now! 🔥 10:15 AM 02 / PRIVACY FIRST 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. 🔒 Offline-First Storage Works 100% offline. Access your apps on a plane, on the subway, or completely
disconnected. 🔑 Secure Local Vault Data stays safely packed inside the single file. Absolute protection from server
breaches. Your device ✦ Life.capsule 0 items · 1.2 MB 03 / CROSS-PLATFORM 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. ⚡ Instant Desktop Launch Launches seamlessly on macOS, Windows, and Linux with zero setup or configuration. 📱 Mobile Support Coming Soon Open and run the exact same .capsule files on iOS and Android devices. App.capsule — macOS Project Workspace ● Saved locally v1.0 Core Tasks 2 / 3 Completed ✓ Local data storage ✓ Cross-platform runtime ○ AirDrop to device Running on macOS GET CAPSULE Ready to run portable apps? Capsule is completely free. Download the host player for your platform and open any .capsule file in seconds. Desktop macOS macOS 12 Monterey or later Download for Apple Silicon (M-series)Download for Intel Mac Windows Windows 10 or later (64-bit) Download Installer (EXE)System Installer (MSI) Linux Ubuntu / Debian / Fedora Download Debian / Ubuntu (.deb)Download RedHat / Fedora (.rpm)Download AppImage (.AppImage)Web Web Runs in your browser for a quick preview. Cannot open or save files directly on your computer. Try Web PreviewMobile (Coming Soon) iOS iOS 16 or later App Store Android Android 9 or later Google Play Capsule Documents that run like apps Product Why Capsule? Templates Web Preview Download © 2026 Capsule. All rights reserved.

Capsule is a system designed to turn documents into functional applications by bundling all necessary components—user interface, media assets, and local databases—into a single, portable file format known as a .capsule file. This approach eliminates the need for reliance on cloud servers, accounts, or complex build configurations, emphasizing file-based portability and immediate usability. The core philosophy behind Capsule centers on creating shareable, self-contained applications that operate locally on the user's device, providing a fundamental shift from traditional cloud-dependent application models.

One of the primary advantages of Capsule is its inherent portability. By packaging data and application elements into a single file, applications can be distributed easily via standard means such as WhatsApp, AirDrop, or email, akin to sharing a PDF or Word document. Upon receiving the file, the recipient can launch the application instantly with all preloaded data, ensuring a seamless and operational experience regardless of the end-user's infrastructure. Furthermore, Capsules adhere to a zero vendor lock-in principle, utilizing standard technologies like HTML and CSS, thereby ensuring that the code and data remain entirely owned by the user, free from restrictive cloud silos.

The system is architected around a privacy-first design. Capsule ensures that all personal data is stored exclusively on the user's device, facilitating offline-first storage capabilities. There is no requirement for cloud storage, account registration, or network connectivity to access or operate the applications, which results in complete security and protection from server breaches. This local vault approach guarantees absolute data security by embedding all created content directly within the file structure.

Capsule is also designed for cross-platform compatibility. Capsule files are inherently cross-platform, allowing the exact same file to be opened and run seamlessly across different operating systems, including macOS, Windows, and Linux, with instant desktop launch capabilities on these systems. While mobile support is planned for future release, the desktop functionality is robust, enabling applications to run with full desktop performance.

Beyond simple packaging, Capsule integrates artificial intelligence to facilitate application generation and iteration. The system allows users to generate complete, self-contained desktop applications from simple prompts. This process involves describing the desired application features, layout, or functionality, which the system translates into a complete .capsule container featuring an HTML user interface, a defined schema, and local data managed via SQLite. Users can then iterate on these applications dynamically by issuing direct prompts to the AI, enabling modifications to features, themes, or schemas through agent-based interactions.

The structure allows for an AI Capsule Agent functionality, where the user can delegate modifications to the AI to adjust the application, further streamlining the development process. For access, Capsule is available as a host player that allows users to open any .capsule file in seconds across desktop platforms. The delivery mechanism supports various formats, including installers for macOS, Windows, and Linux, as well as web preview functionality for quick viewing in a browser. The availability across platforms demonstrates a commitment to making powerful application bundling accessible through diverse operating environments.