Castov
A collection of development utilities available in the browser, terminal, and AI editors.
What does it do?
In the browser, users can format JSON, inspect JWTs, and convert timestamps, then pass results to another utility. For example, they can turn JSON into a TypeScript interface or check a Cron schedule across time zones. The same utilities are available through a local terminal CLI and an MCP server for Cursor and Claude. Browser based cryptographic and conversion tasks run in local memory.
Key features
- Pass JSON output into TypeScript interface generation
- Convert Cron schedules and timestamps across time zones
- Run cryptographic tasks, JWT inspection, and JSON formatting locally in the browser
- Use a CLI and an MCP server for Cursor and Claude
- Share compressed input and settings in a URL hash fragment
- Run locally in the browser or in a Docker container