JSON Random Generator — Faker-Powered Test Data

Generate random JSON data using Faker.js for testing and prototyping. Customize structure, types, and output size. 100% client-side.

1
Generated JSON—
Output:
🛡️Zero server logs. Generation runs 100% inside your browser.
🛠️Developer Tool Belt
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JSON Random Generator — Faker-Powered Test Data

Generate random JSON data using Faker.js for testing and prototyping. Customize structure, types, and output size. 100% client-side.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Use

  1. Configure your data structure using the field definitions panel with types and options.
  2. Adjust the number of items to generate and any field-specific settings.
  3. Click Generate to create random data and copy it for immediate use in testing or demos.

Frequently Asked Questions

Questions about this tool? We've got answers.

What data types can be generated?

Strings, numbers, booleans, arrays, and objects. String fields can use Faker generators for names, emails, phone numbers, addresses, UUIDs, and more.

Can I customize the output?

Yes. You can define field names, select Faker data types, set min/max values for numbers, control array lengths, and choose output formats.

Is my data sent to a server?

No. All generation runs 100% inside your browser via a Web Worker.

Automated E2E Test Suite Logs

Our build systems validate edge-case processing under extreme conditions before each deployment.

Stability
100.0%
Passed
20/20
Env
V8-Sandbox
Engine: Vitest RunnerUpdated: 2026/6/11 00:18:12📦 Download Test Datasets
PASSgenerateRandomJson generates a single object
PASSgenerateRandomJson generates multiple objects as array
PASSgenerateRandomJson generates 100 objects
PASSgenerateRandomJson throws on count < 1
PASSgenerateRandomJson throws on count > 100
PASSgenerateRandomJson generated object fields have correct types
PASSJsonRandomGeneratorTool renders Generate button
PASSJsonRandomGeneratorTool renders Generated JSON label
PASSJsonRandomGeneratorTool renders a textarea
PASSJsonRandomGeneratorTool renders count slider
PASSJsonRandomGeneratorTool shows default count of 1
PASSJsonRandomGeneratorTool shows placeholder before generation
PASSJsonRandomGeneratorTool shows privacy strip
PASSJSON Random Generator Worker Standard generation operations should generate a single random user
PASSJSON Random Generator Worker Standard generation operations should generate multiple random users
PASSJSON Random Generator Worker Standard generation operations should generate different output on successive calls
PASSJSON Random Generator Worker Boundary Conditions & Error Handling should return error for count less than 1
PASSJSON Random Generator Worker Boundary Conditions & Error Handling should return error for count exceeding 100
PASSJSON Random Generator Worker Boundary Conditions & Error Handling should handle count of 100 successfully
PASSJSON Random Generator Worker Performance Benchmark should generate 100 users within acceptable limits
⏱️ 0.18ms📦 1.5KB🎚️ Max Nesting: 3🌿 AST Nodes: 48🛡️ V8 Heap: Healthy
$ codecaven-validator --scope=tool● CLUSTER COMPLIANT

Tool Changelog & Updates

1.0.02026-06-10
  • Feature: Initial release