Creating a functional UI or testing your application thoroughly often requires realistic API responses. Our free online JSON data generator helps you quickly create custom JSON data for mocking API endpoints, generating test data, and accelerating development workflows.
We now offer two convenient ways to generate mock API responses:
These features allow frontend and backend teams to work in parallel, simulate error scenarios, and streamline prototyping and testing.
JSON Generator is an online tool designed for developers, testers, and educators who need to generate and manage JSON data with precision and ease. Whether you want structured schema-based data or quick endpoints using raw JSON, our platform simplifies the entire process.
You can define templates that control the structure and content of your JSON output. Use it to mock API responses, generate diverse test payloads, or create meaningful educational examples. The flexibility and speed of this tool make it an essential resource for modern development teams.
Supports Schema and Raw JSON: Generate mock APIs from either a defined schema or your own JSON data, offering complete flexibility for your workflow.
Fast and Intuitive: Our simple interface makes it easy to define, modify, and export JSON without writing any code.
Designed for Developers and Testers: Ideal for mocking APIs, testing frontends, and creating demo environments in minutes.
High-Volume and Consistent Data: Quickly generate large datasets with consistent formatting, helping you simulate production-like scenarios.
Flexible Editing: Modify your JSON structures on the fly without starting over, saving time during iteration.
Standards-Compliant: All JSON output follows RFC 8259 and ECMA-404 specifications to ensure broad compatibility and validation.