Jaconir

Client-Side API Response Mocker

Define a JSON schema, generate mock data, and get a temporary, shareable API endpoint. No backend required.

1. Define Schema
Provide a valid JSON schema. Mock data will be generated based on this structure.
2. Generated Endpoint
Use this temporary URL to fetch your mock data.

Your endpoint URL will appear here.

3. Mock Data
This is the data generated from your schema.

Your generated JSON response will appear here.

How to Use the API Mocker Effectively

This tool is invaluable for frontend developers who need a quick, temporary backend to develop against. No need to wait for the real API to be ready.

1. Define Your Data Structure

Start by writing a JSON Schema that represents the data structure you expect from your API. You can use our example schema as a starting point. The generator understands common formats like "email" and "date-time".

2. Generate and Share

Click "Generate Endpoint & Data". You'll instantly get a mock JSON response and a shareable URL. You can give this URL to other developers on your team so everyone is working with the same mock API.

3. Develop Your Frontend

Use the generated URL in your frontend application (e.g., with `fetch` or `axios`) just like you would a real API endpoint. This allows you to build out your UI, state management, and data handling logic completely independently.

Need to validate a `.env` file? Check out another one of our developer tools.

Try the .env Validator
Frequently Asked Questions