OpenAPI Generator

A browser-based editor for creating OpenAPI 3.1 documents. Specs are stored locally in IndexedDB and can be imported or exported as JSON and YAML.

Features

• Manage multiple local OpenAPI documents
• Edit API metadata, servers, and server variables
• Configure reusable security schemes and global security requirements
• Create paths, parameters, servers, HTTP operations, request bodies, and responses
• Build recursive schemas with properties, arrays, enums, composition, and reusable references
• Build reusable components and named webhooks
• Edit advanced OpenAPI fields and specification extensions as JSON
• Import JSON or YAML and export either format
• Select color themes and light or dark mode

All document data stays in your browser unless you explicitly download or upload a file.

Development

Requires Node.js and pnpm.

pnpm install
pnpm dev

The development server is available at http://localhost:5173.

Verification

pnpm check
pnpm test
pnpm lint
pnpm build

Production

Build and start the Node server:

pnpm build
pnpm start

The server uses the standard SvelteKit adapter-node environment variables, including HOST and PORT.