JSON Mock Data Generator

Generate a sample JSON array based on field definitions.

Category: Dev Tools

When to use?

Use it when you need a simple sample JSON array before frontend development or API documentation.

How to use

  • Enter fields as name:type.
  • Specify how many to generate.
  • Copy the sample JSON array.

Input Explanation

Enter field definitions per line like id:number, name:string, email:email, active:boolean, createdAt:date.

Calculation Basis

It generates static sample values matching each field type by row index and builds an object array with Object.fromEntries.

Usage Examples

  • Frontend mockups - Quickly make dummy data for component development.
  • Quick pre-deploy check - Check inputs and output to reduce errors before dev/ops work.
  • Aid docs/reviews - Copy the result into dev docs, issues, or review comments.

Examples

  • name:string, active:boolean → [{"name":"sample-1","active":true}]
  • id:number, name:string definitions, 10 items → a mockup array for UI development

Cautions

  • Generated output is for reference; test carefully before production use.
  • It generates reproducible static sample data.

FAQ

Is it random data?

It generates reproducible static sample data.

How do I define fields?

Specify the field name and type (string, number, boolean, etc.) to build sample objects matching that structure.

Is the data the same each time?

It generates reproducible static samples, so the same definition yields consistent results.

How many can I generate?

Specify the count to make as many sample objects as your testing needs.

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