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.

Number of objects:1

Generated JSON—

Output:

🛡️Zero server logs. Generation runs 100% inside your browser.

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

Configure your data structure using the field definitions panel with types and options.
Adjust the number of items to generate and any field-specific settings.
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: 2026/7/16 02:08:13📦 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

v1.2.02026-06-12

UX: Updated About descriptions, How-to guides, and FAQ sections with detailed multi-language content.
UX: Added Load URL button via shared LoadUrlModal component for remote JSON loading.
Fix: Fixed i18n key names to match component usage — corrected "convert" to "generate"/"flatten"/"unflatten"/"merge" as appropriate.

1.1.02026-06-11

Feature: Added Web Worker thread-isolated test suite covering single and multiple random user generation with uniqueness validation across successive calls.
Test: Introduced boundary validation for count out of range (less than 1 and exceeding 100) and maximum capacity (100 users) handling.
Performance: Included 100-user generation stress benchmark with execution time and memory telemetry.

1.0.02026-06-10

Feature: Initial release