{ }JSON Object Editor Open Editor
100% client-side · no sign-up

Fake JSON data generator for tests, demos & mocks

Spin up realistic mock data in seconds. Use a ready-made dataset — users, products, or orders — or design your own schema field by field. Export straight to JSON, CSV, or YAML.

Dataset
Count
Generated JSON
0 records
Ready — pick a mode and click Generate

Why use a fake JSON data generator

Skip writing throwaway fixtures by hand. Generate believable records for UI prototypes, API mocks, seed scripts, and load tests in a couple of clicks.

🎯
Ready-made datasets
Users, products, and orders come pre-modeled with realistic fields like email, price, rating, and order status — no setup required.
🔧
Custom schema builder
Name your own fields and assign a type to each — from names and emails to UUIDs, dates, and booleans — to match your exact data shape.
💾
Export to JSON, CSV, or YAML
Download generated records in the format your test suite, spreadsheet, or config file needs.
🔒
100% client-side
Records are generated with JavaScript in your browser. Nothing is sent to a server or logged anywhere.

Frequently asked questions

Is this fake data generator really free?

Yes. There's no sign-up, no rate limit, and no watermark on the output. Everything runs in your browser.

Does the generated data get sent to a server?

No. All records are generated locally with JavaScript in your browser. Nothing is uploaded or logged anywhere.

Can I define my own fields instead of using a preset?

Yes — switch to Custom Schema mode, name your fields, and pick a type for each one (name, email, city, integer, boolean, date, and more).

What formats can I export the generated data in?

JSON, CSV, and YAML are all supported with one click, using the same export logic as the main JSON editor.

More JSON tools

JSON Editor
Edit, validate, and explore JSON with tree/table/chart views.
Schema Generator
Infer a JSON Schema from any document, including generated data.
Type Generator
Turn generated JSON into TypeScript, Java, or Go types.
JSON ↔ CSV
Convert any JSON array to CSV and back.
JSON Formatter
Beautify or minify generated records.