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Build Mock APIs
in Seconds

Backend API not ready? Don't wait. Use this lightning-fast, offline-capable desktop tool to design, test, and document your APIs independently.

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Mocky Desktop Mock API Tool Interface with Monaco Editor

Why Choose Mocky?

Leave behind makeshift scripts. Embrace a professional development workflow.

The Old Pain

Manual, slow, error-prone

  • Writing tons of configs just to handle CORS
  • Manually restarting server after every change
  • Maintaining huge, unreadable JSON files
  • No documentation for other team members
  • Writing code just to simulate delays or errors

The Mocky Way

Visual, fast, automated

  • Auto CORS handling, works out of the box
  • Hot Reload takes effect instantly, no restart needed
  • Professional editing with Monaco Editor
  • Beautiful API docs generated with one click
  • Easily simulate network latency and error states

Everything You Need to Mock Your Backend

Powerful professional features, packed into a lightweight desktop app.

Professional-Grade Editing Experience

Built-in Monaco Editor with full JSON validation, syntax highlighting, and auto-formatting.

response.json
{
  "message": "Hello World"
}

Intuitive Visual API Management

Easily manage routes through a graphical interface. Supports real-time search, grouping, and filtering.

GET/users
POST/login
PUT/products/:id

Generate Professional Docs in Seconds

Auto-generate Swagger UI and Redoc static documentation from your mock data. Share with your team anytime.

POST

Local-First, Security Guaranteed

All data stored on your computer, fully offline-capable. Listens only on 127.0.0.1, safe for enterprise use.

Intelligent Service Management

Auto-detects port conflicts, Hot Reload takes effect instantly. Start or stop Mock Server with one click.

Reload
Start

Built for Your Entire Development Team

Streamline team collaboration with a unified API mocking tool.

Backend API Not Ready? Keep Going!

Create a Mock API in 3 seconds and start building your UI right away. Never let backend progress slow you down.

  • No longer blocked by backend API progress
  • Develop UI with realistic data structures
  • Easily test edge cases (errors, loading)

And More Practical Features...

Fully offline-capable, no internet required
Multi-project management, isolated environments
Real-time route search and group filtering
OpenAPI v3 standard import/export
Dynamic response delay simulation (test loading)
Custom HTTP status codes (error simulation)
Export Redoc static HTML with one click
No registration, no login, ready to use
Supports dynamic route parameters (e.g. /users/:id)

Frequently Asked Questions

Everything you need to know about Mocky

Mocky is a lightweight, offline-capable desktop Mock API tool designed for rapid development. It allows you to design, test, and document APIs through a visual interface without writing any backend code. Core features include a visual editor, Hot Reload live preview, and one-click OpenAPI documentation generation.
Using Mocky is simple: First, click 'New Project' in the dashboard. Next, add routes in the visual editor (e.g., /api/users). Then, define response content using the built-in Monaco Editor. Finally, click 'Start' to launch your local Mock Server. The entire process takes less than a minute!
Yes, Mocky is completely free! Licensed under PolyForm Shield License 1.0.0, you can freely use, modify, and distribute it, including in commercial projects, without payment. The only restriction is that you cannot use it to provide competing commercial services.
Mocky is fully compatible with macOS, Linux, and Windows. Whether you're working on a Mac, running Linux, or using Windows, you'll get the same seamless experience.
Absolutely! Mocky is designed as a fully offline-capable desktop application. All data is stored locally on your computer, and it works perfectly without an internet connection. This also ensures your API design data remains completely secure.
Full support! Mocky supports both importing and exporting OpenAPI v3 standard format. Import existing OpenAPI JSON files to quickly create projects, or export your projects as standard OpenAPI format to share with your team.
Mocky focuses on rapidly building Mock APIs, while Postman is primarily for API testing. Mocky provides a visual editor, Hot Reload, one-click documentation generation, and more—allowing frontend developers to create Mock APIs in 3 seconds without writing any code.
No! Mocky follows a 'Local-First' design philosophy. All project data and API configurations are stored entirely on your local computer. The Mock Server only listens on 127.0.0.1, ensuring no data leakage—perfect for handling sensitive enterprise APIs.
Yes! While Mocky is a desktop app, you can share projects through exports. Export projects as OpenAPI JSON files or Redoc static HTML, send to team members. They can import JSON files to continue editing or view Redoc docs to understand API specifications.
Hot Reload is one of Mocky's core features. When you modify API routes, response content, or status codes, changes take effect immediately without manually restarting the Mock Server. This dramatically improves development efficiency, allowing you to test frontend-API interactions in real-time.
Mocky has built-in intelligent port management. If your configured port (default 8000) is already in use, Mocky automatically increments to find an available port (8001, 8002...) and displays the actual port being used, ensuring your Mock Server starts successfully.
Yes! Mocky is licensed under PolyForm Shield License 1.0.0, which allows use in commercial projects, including enterprise internal use and personal commercial projects. The only restriction is that you cannot use Mocky to provide competing commercial services (e.g., developing and selling a competing product based on Mocky). If you have questions, feel free to contact us.
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