
Mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
- Free • Open Source
- Mac
- Windows
- Linux
What is Mockoon?
Mockoon is a free and open source desktop application allowing to quickly mock servers and APIs. It packs some great features:
- Unlimited mocking: Create an unlimited number of mock API with unlimited number of routes and run them in parallel.
- Import / export: Mock API import / export with Swagger/OpenAPI format support.
- Route regex: Route regex supported (/.*, /[a-z]{3}, ...), based on ExpressJS syntax.
- Multiple responses per route: Serve multiple rules-triggered responses for each route with any headers body, or HTTP status codes.
- CORS: Automatically send CORS headers (Access-Control-Allow-Origin, etc.) for OPTIONS requests.
- HTTPS: Serve your mock API over TLS with self-signed certificate.
- Response headers: Add any response headers to your routes and mock API. With auto-completion.
- Latency: Add latency at environment or route level or even both.
- Requests and responses logs: All incoming requests and outgoing responses are logged for easier debugging.
- Proxy mode: Redirect all non-defined routes to the specified host with Mockoon's proxy mode.
- File serving: File serving with automatic mime type detection and templating support.
- Rich text editor: Rich text editor for body content supporting multiple languages (JSON, HTML, etc).
- Templating: Templating supported in body, file content and header, with many helpers: url params, query params, JSON body lookup, etc.
- Auto-save: Real-time auto save as you type. Never worry again about saving!
- Offline: No account, no sign-up, no cloud deployment required.
Mockoon Screenshots




Mockoon Features
Mockoon information
Supported Languages
- English
GitHub repository
- 4,618 Stars
- 269 Forks
- 74 Open Issues
- Updated
Comments and Reviews
Tags
- mockups
- swagger
- openapi
- Api
- mocking
- api-documentation
- mock
- http-analyzer
If you are creating an application and you need to simulate an API, with Mockoon you can create API simulation services. It's easy to use and it's free
One of the rare tools I use almost daily. We are behind a company firewall with no access to clients' APIs, mocking them really helps!
Mockoon is a fantastic time saver. I've tried 2 other API mocking services before, Mockoon is by far the best. Easy to use, fast, and free.
I gained so much time using this app both on personal projects and at work. You can create mock APIs in no time, either when you cannot access clients API or just want to quickly test an integration. Set up and forget it. Mockoon being a desktop software, it also helps a lot when you don't have access to cloud solutions.