JSON Generator Online — Generate Fake JSON Data with Faker.js
Generate realistic fake JSON data in bulk. Edit a Faker.js template, choose how many records you want, and generate structured test data instantly — free, private, and in your browser.
Faker.js fields reference — click any field to copy
date
number
string
airline
animal
book
color
commerce
company
database
finance
food
git
hacker
image
internet
location
lorem
music
person
phone
science
system
vehicle
word
How to use JSON Generator
- Edit the template on the left using Faker.js functions.
- Set how many records you want in the Records field.
- Click Generate to produce seeded, structured JSON.
- Copy or download the output.
Features
Powered by Faker.js
Generate realistic names, emails, addresses, dates, and more.
Bulk generation
Create up to 1,000 records in a single click.
Custom templates
Define your own JSON shape with JavaScript expressions.
Reproducible data
Seeded output means the same template gives consistent results.
Field reference
Browse every Faker.js field and copy it into your template.
100% private
Data is generated in your browser — nothing is uploaded.
What is JSON Generator?
A JSON generator produces realistic test data in JSON format for development, testing, and demos. Using Faker.js, this tool turns a template of JavaScript expressions into structured records that mimic real-world data — names, emails, addresses, and more — without any manual data entry.
Common use cases
API development
Create mock API responses for building and testing endpoints.
Database seeding
Populate databases with realistic test data.
UI/UX prototyping
Fill mockups and prototypes with lifelike content.
Performance testing
Generate large volumes of data to test scalability.
Demos & documentation
Produce sample data for examples and API docs.
Edge cases
Craft templates that include special characters and boundaries.
Related JSON tools
Frequently Asked Questions
Everything you need to know about JSON Reader