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Free Data Generator for Test Data, Seed Data, JSON, CSV, and Demos

Generate realistic records for apps, spreadsheets, local databases, QA workflows, and example payloads. Everything runs in the browser and exports cleanly to JSON or CSV.

👤 People Fields

5 of 15 fields enabled

  • First Name
    firstName
  • Last Name
    lastName
  • Full Name
    fullName
  • Email
    email
  • Phone
    phone
  • Gender
    gender
  • Age
    age
  • Date of Birth
    dob
  • Username
    username
  • Password
    password
  • Avatar URL
    avatar
  • Bio
    bio
  • Job Title
    jobTitle
  • Department
    department
  • Language
    language
Seed
A seed makes your data 100% reproducible — the same seed always generates the same rows. Great for sharing datasets with teammates, debugging, or versioning test fixtures. Without a seed, every generate run produces different data.
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Ready to generate

Configure your fields above, set the row count, and hit ⚡ Generate.

Up to 10,000 rows · CSV and JSON export · clipboard copy

Free browser-based data generator for developers and QA teams

data-generator.io helps you generate realistic synthetic records for demos, local development, spreadsheets, imports, and testing. It is broad by design, which makes the homepage the strongest target for the generic data generator searches across the domains you own.

What the homepage covers best

Use the main page for broad generator intent, especially when the user is not yet narrowed to seed-data or test-data workflows.

  • People, companies, products, orders, addresses, and employee directories
  • Broad JSON and CSV generation for imports, examples, mock data, and ad hoc test cases
  • Custom field mixes for demos, QA flows, internal tools, and sample datasets
  • Up to 10,000 rows with browser-only generation and reproducible seeds

How to use the main generator

  1. Pick a profile from the sidebar or create a custom one.
  2. Toggle fields, rename labels, and match the keys to your target schema.
  3. Set a row count and optionally enable a seed for reproducible output.
  4. Generate the dataset and export it as JSON or CSV.

Why a broad homepage still matters for SEO

Many searches are not specific enough to deserve a dedicated narrow landing page. A strong homepage captures broad “data generator” and “fake data generator” demand, then routes visitors into seed-data or test-data use cases with internal links and relevant copy.

Best fit for data-generator domains

Because you own broad brand domains like data-generator.io and data-generator.dev, the homepage should stay general-purpose and conversion-oriented rather than trying to overfit one specific testing workflow.

Explore related generators

Seed DataFree Seed Data Generator for Databases and Local Dev | data-generator.ioGenerate repeatable seed data for databases, local development, fixtures, and staging environments. Export realistic users, orders, invoices, and more as JSON or CSV.Test DataFree Test Data Generator for QA, CSV Imports, and API Mock Data | data-generator.ioGenerate realistic test data for QA, CSV imports, spreadsheets, bulk uploads, and API mock payloads. Export JSON or CSV instantly and keep everything private in the browser.

Frequently asked questions

Is the data generator free?
Yes. The generator is free to use, runs in the browser, and does not require an account.
What formats can I export?
You can export generated rows as JSON or CSV, and you can also copy the dataset for use in spreadsheets or test fixtures.
Does any data get sent to a server?
No. Generation happens locally in your browser, so none of the rows are uploaded or stored remotely.
Can I use this for demos and imports?
Yes. The homepage experience is intended for broad data generation use cases including sample files, demos, spreadsheet imports, and quick ad hoc test data.
Can I change field names and JSON keys?
Yes. Each field can be toggled, relabeled, and mapped to a custom key before export.