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orval generates type-safe JS clients (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification, either in yaml or json formats.

generate models, requests, hooks, mocks and more, for these supported clients:

• React
• React Query
• React with swr
• Vue Query
• Svelte Query
• Angular
• Angular Query
• Hono
• zod
• native fetch
• mcp

You can find some samples below:

• react app
• react query
• svelte query
• vue query
• react app with swr
• angular app
• angular query
• hono
• next app with fetch
• mcp server

Try Orval out for yourself using our Playground application!

This project uses Yarn for package management and building. Here are the key scripts available for development:

Before using Yarn scripts, ensure you have Yarn installed. You can install it globally using npm:

npm install -g yarn

Alternatively, you can enable Corepack (which comes with Node.js 16.10+) to manage Yarn:

corepack enable

• yarn nuke:all - Completely clean your workspace by removing all build artifacts, node_modules, and cached files. Use this when you want to start fresh.

• yarn build - Build the project and make changes available to the workspace. Run this after making code changes to compile TypeScript and prepare the project for use.

• yarn test - Run unit tests in all packages.

• yarn update-samples - Generate sample outputs using the newly built version of Orval. This regenerates the sample code based on the current build.

• yarn test:samples - Run tests in the samples directory using the newly generated output from update-samples.

• yarn test:cli - Test that the generated output (not samples) is valid TypeScript. This validates the TypeScript compilation of the generated code.

A typical development workflow would be:

1. Make your code changes
2. Run yarn build to compile your changes
3. Run yarn test to ensure unit tests pass
4. Run yarn update-samples to regenerate sample outputs
5. Run yarn test:samples to verify samples work correctly
6. Run yarn test:cli to validate TypeScript compilation

If you encounter issues or want to start completely fresh:

1. Run yarn nuke:all to clean everything
2. Reinstall dependencies and rebuild from scratch

Thank you to all our sponsors! 🍻

Support orval development by Open Collective and your logo will be displayed here with a link to your website.

Thank you to all our backers! 🙏

Support us with a one-time donation and help us continue our activities on Open Collective.

Note: After becoming a sponsor or backer, please contact us on Discord to upload your logo.