JSON Mock API
Mock API in seconds

Turn JSON into a live REST API

Upload your JSON or paste it — get an instant endpoint. Test your app, mock backends, or prototype without writing server code.

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How it works

Three steps to a live API.

  1. Paste or upload JSON — e.g. {"name": "Ali", "age": 25}
  2. Choose an endpoint name — e.g. users → your API is live at /api/users
  3. Use GET, POST, optional delay, status codes, and custom headers to test your app.

Features

Everything you need to mock APIs and test your apps.

JSON → API

Any valid JSON becomes a working REST endpoint instantly. No backend required.

Delay & status

Simulate slow networks with a delay and control HTTP status (200, 404, 500).

Random data

Use placeholders like {{name}}, {{email}} for dynamic responses every request.

HTTP methods

Support GET, POST, PUT, DELETE — or allow all. Control which method your endpoint accepts.

Custom headers

Set response headers (e.g. Content-Type, X-Custom-Header) per endpoint.

Usage & limits

Dashboard shows requests per day. Free and Pro plans with clear limits.

Services

What you can do with JSON Mock API.

Frontend testing

Mock backend responses while building UIs. No need to run a real server.

API prototyping

Share a live endpoint with your team or client before the real API is ready.

Load & error simulation

Test loading states with delay and error handling with custom status codes.

FAQ

Common questions.

No. Paste your JSON (or upload a file), choose an endpoint name, and your API is live. Optional settings like delay and status code are form fields.

In your JSON you can use {{name}}, {{email}}, {{uuid}}, {{date}}, etc. Each API request will replace them with random values so you get dynamic data.

Yes. Free plan: 1000 requests per day. Pro: 10,000 per day. If you exceed the limit, the API returns 429 until the next day.

JSON Mock API is meant for testing, prototyping, and demos. For production backends, use a proper API or backend service.

Pricing

Start free. Upgrade when you need more.

Free

3 endpoints · 1,000 requests/day

  • Instant API from JSON
  • Delay & status codes
  • Faker placeholders
Get started
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Pro

Unlimited endpoints · 10,000 requests/day

  • Instant API from JSON
  • Delay & status codes
  • Faker placeholders
  • Unlimited endpoints
  • 10,000 requests/day
Get started