What fields does each preset generate?

Users: UUID, name, email, city, country, active, date. Orders: order_id, customer, total, currency, items, status. Finance: tx_id, merchant, amount, currency, settled. DevOps: trace_id, ip, method, path, status_code, latency_ms. IoT: device_id, temperature, battery, status. Healthcare: patient_id, blood_type, blood pressure, admission status.

Is the generated SQL safe to run as-is?

Values are inlined as escaped string literals (single quotes doubled), not parameterized placeholders - this is meant for quick database seeding, so review it before running against production.

What's the maximum row count?

The Rows field is capped at 250 by default; typing a larger number still works since generation itself is clamped at 500 rows internally.

Is the data reproducible between regenerations?

No. Every click of Regenerate produces a fresh, unseeded random dataset - values aren't deterministic across runs.

Does the CSV export handle commas and quotes correctly?

Yes. Any field containing a comma, quote, or newline is automatically wrapped in double quotes with internal quotes escaped, per standard CSV rules.

Mock Data & Schema Faker

Generate realistic test datasets for API prototyping, unit tests, and database seeding. Export to JSON, CSV, or SQL. 100% in-browser.

Private by architecture: All processing is 100% client-side memory. Your data never leaves this browser tab.

Preset:

Format:

Rows:

Generated Mock Dataset 10 records

Ready JSON

Why Generate Test Data Locally in the Browser?

100% Offline & Private

All fake data generation runs inside your browser thread. No external faker APIs or tracking scripts.

Instant Multi-Format Export

Switch seamlessly between JSON arrays for React/Vue APIs, CSV for Excel/Sheets, and SQL INSERTs for database seeds.

High-Speed Prototyping

Generate up to 250 records in less than 5 milliseconds with instant single-click file download.

Key Features

Multiple built-in presets: User Profiles, E-Commerce Products, Network Logs, and Auth Sessions, each with its own fixed field schema.
Three export formats: JSON array, CSV, or SQL INSERT statements, switchable instantly without regenerating.
Adjustable row count: generate anywhere from a handful of rows up to the field cap.
Copy Dataset & Download File: one-click clipboard copy or save-to-disk in the active format extension (.json/.csv/.sql).
Regenerate on demand: get a fresh random dataset any time without touching your preset or format choices.

FAQ

What fields does each preset generate?: User Profiles: UUID id, name, email, city, country, boolean active flag, and a registration date. E-Commerce Products: incrementing id, title, price, status, and an in-stock boolean. Network Logs: UUID id, IP address, timestamp, and status.
Is the generated SQL safe to run as-is?: Values are inlined as escaped string literals (single quotes doubled), not parameterized placeholders - this is meant for quick database seeding, so review it before running against production.
What's the maximum row count?: The Rows field is capped at 250 by default; typing a larger number still works since generation itself is clamped at 500 rows internally.
Is the data reproducible between regenerations?: No. Every click of Regenerate produces a fresh, unseeded random dataset - values aren't deterministic across runs.
Does the CSV export handle commas and quotes correctly?: Yes. Any field containing a comma, quote, or newline is automatically wrapped in double quotes with internal quotes escaped, per standard CSV rules.