DeveloperFree Tool

JSON Mock Data Generator

Provided byDevBoltdevbolt.dev

Generates realistic fake JSON data for API testing with 30+ field types and schema builder.

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About this tool

Generates structured, synthetic data formatted as JSON to simulate real API responses for testing purposes. The tool provides an interactive environment where users can define a desired data schema and populate various fields with realistic placeholder values. It supports numerous data types beyond simple strings, allowing developers to build complex mock objects that accurately mimic the structure of live backend services. Users adjust field names, select appropriate data formats, and generate complete JSON payloads instantly for immediate use in development workflows. Developers building or testing API integrations utilize this generator to create reliable test datasets without requiring actual backend endpoints.

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