Fake / Test Data Generator
Build a schema and generate realistic mock data in bulk — export JSON, NDJSON, CSV or SQL. Seeded for reproducible fixtures, 100% private.
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🔒 100% private & offline — every value is synthesised in your browser from built-in lists; nothing is uploaded. The same seed + schema always reproduces the exact same data set. Generated content is fictional; credit-card numbers use known test ranges and are not real.
Why you’ll love Fake / Test Data Generator
Instant & free
No signup, no paywall, no limits — Fake / Test Data Generator works the moment the page loads.
Completely private
Everything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any device
Fully responsive and touch-friendly — use it on your phone, tablet or desktop.
Built by developers
Accurate, fast and keyboard-friendly — the details developers care about.
How to use it
Open it
No download and no login — the tool is ready right at the top of this page.
Use it
Enter your details or start interacting. Everything updates live as you go.
Get your result
Copy, download or share your result in a single tap. That’s it.
About Fake / Test Data Generator
Generate realistic test data instantly with this free fake data generator. Build custom schemas and produce mock data in bulk — perfect for populating databases, testing APIs, or running load tests without risk. Export your dummy data as JSON, NDJSON, CSV, or SQL directly. Everything runs in your browser with no signup required, and your data never leaves your device, ensuring complete privacy for your test datasets.
This mock data generator uses seeded generation to create completely reproducible test datasets, letting you regenerate identical fixtures whenever you need them for consistent testing. Define your schema once, set a seed value, and get identical sample data across multiple runs. Ideal for developers testing new features, QA teams validating systems, database administrators preparing test environments, or anyone building reliable dummy data for integration tests.
Built for developers who need quality sample data fast. No installation, no accounts, no complicated workflows — just define your data structure and generate as much dummy data as you need in seconds. Export in whatever format your project requires: JSON for APIs, CSV for spreadsheets, SQL for databases, or NDJSON for streaming pipelines. Perfect for filling test environments without manual data entry.
Popular uses
Frequently asked questions
Yes. This test data generator runs entirely in your browser — all processing happens on your device, and nothing is sent to any server. Your generated mock data never leaves your computer.
Yes. The seeded generation feature ensures reproducible results. Set a seed value when defining your schema, and you'll get identical sample data every time you generate it. Perfect for consistent test fixtures.
You can export as JSON (single file), NDJSON (newline-delimited for streaming), CSV (for spreadsheets), or SQL (INSERT statements for direct database loading).
No. This fake data generator is completely free and runs in your web browser. No installation, no account creation, no login required.
Fake / Test Data Generator is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Never. Everything is processed locally in your browser — safe for secrets, tokens and proprietary code.
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