A mock API is a fake REST API that returns sample data for testing and development. Mock APIs let frontend developers, QA teams, and product managers test integrations without a real backend. apismaker lets you create mock APIs in 60 seconds from JSON, Excel, or CSV — no code required.

How do I create a mock API for free?

Sign up at apismaker.com, pick a template or import your data (JSON, Excel, CSV), and get instant REST endpoints. No code required. You can try our free mock API demo without signing up.

What is the best free mock API generator?

apismaker is a free mock API generator that lets you create REST APIs in 60 seconds. Import JSON, Excel, or CSV. No code required. Try the demo without signup.

How do I create a fake API for testing?

Use apismaker to create a fake API for testing. Import your data (JSON, Excel, CSV) or pick a template. Get instant REST endpoints. No backend required.

Can I turn Excel into an API?

Yes. apismaker converts Excel, CSV, and JSON files into REST APIs. Upload your file, map columns to entity fields, and get working endpoints in 60 seconds.

What is a no-code API builder?

A no-code API builder lets you create APIs without writing code. apismaker is a no-code API builder. Import data or use templates to get REST endpoints instantly.

How do I create a mock API for React or frontend development?

Use apismaker to create a mock API for frontend development. Get REST endpoints in 60 seconds. No backend needed. Test your React app against real-looking API responses.

Convert Excel to REST API — Step-by-Step Guide

March 4, 2026

Have data in Excel or CSV? Turn it into a live REST API in minutes. Upload your file, map columns to your schema, and serve JSON to any client.

Step 1: Create a project and API

Create a new project in apismaker and add an API. Define the path (e.g. /products) and the entity fields that match your data.

Step 2: Upload your Excel or CSV file

Go to the Data Import section and upload your file. apismaker supports .xlsx, .xls, and .csv. The first row is used as column headers.

Step 3: Map columns to entity fields

Preview your data and map file columns to your API entity fields. You can include or exclude columns, and use dot notation for nested objects (e.g. user.address.city).

Step 4: Use your API

Your data is now served as JSON. GET requests return the data with optional filtering and pagination. Share the API URL with your team or integrate it into your app.

Convert Excel to REST API — Step-by-Step Guide

Step 1: Create a project and API

Step 2: Upload your Excel or CSV file

Step 3: Map columns to entity fields

Step 4: Use your API

Try it yourself