Simon Willison announced the launch of Datasette Apps, a new plugin that allows users to host custom HTML+JavaScript applications within the Datasette framework. These apps operate in a secure sandboxed environment, enabling read-only SQL queries and controlled write operations, thus expanding Datasette's functionality beyond merely serving data to creating interactive applications.
Datasette Apps introduces a powerful mechanism for securely running self-contained HTML+JavaScript applications within a Datasette instance, using a sandboxed `<iframe>` environment and a strict Content Security Policy. This advancement not only enhances the potential for building custom data interfaces and visualizations but also reflects a broader trend towards integrating AI-assisted development tools, as seen with the use of LLMs like GPT-5.5 and Claude for both code generation and security evaluation. For someone tracking Claude Code, Codex, and Copilot, this represents a significant step in combining AI capabilities with secure, flexible app development frameworks.