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
Continuously validate document structure, references, parameters, operation IDs, and security
Undo and redo changes across editor screens
Autosave saved specifications and inspect exact JSON or YAML in the Review workspace
Recover unsaved drafts after an accidental refresh or browser restart
Render interactive API documentation and test requests with Scalar
Jump to sections, paths, and components with Ctrl+K or Cmd+K
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.

Requires Node.js and pnpm.

pnpm install
pnpm dev

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

pnpm check
pnpm test
pnpm lint
pnpm build

Build and start the Node server:

pnpm build
pnpm start

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