Capsule pitches portable web apps in single-file SQLite containers
Presented on Hacker News, Capsule claims to bundle an app’s interface, assets, schema and local data into a shareable .capsule file that runs offline.
Capsule has been presented on Hacker News as a tool for packaging web applications into portable, single-file containers backed by local SQLite data.
The product description says each .capsule file can include an HTML interface, media assets, database schema and stored data. Capsule claims the files run without cloud accounts, servers or network access, with desktop support for macOS, Windows and Linux.
The company says users can create complete applications from prompts and modify features, layouts, dark mode settings or schemas through direct artificial-intelligence prompts or MCP coding tools. It positions the format as combining the portability of a document with an application interface and local database.
Capsule also says files can be shared through WhatsApp, AirDrop or email, with recipients opening them with data preloaded. Suggested uses include interactive trackers, portfolios, recipe notes and project logs.
The product description says native iOS and Android support is coming soon, while also referring to opening files on those devices. Its claims about offline operation, cross-platform compatibility, performance and security have not been independently verified, and the Hacker News presentation does not establish broad release or adoption.
