Deterministic test data with seeds and CSV output. Reproduce the same results every time for reliable test suites.
FakeData
Zero-config test data for your stack
demo
Use Cases
Testing
Try it yourself:
$ fakedata --seed 42 -n 10 -H email country
Quick mock data for APIs with NDJSON. Choose from 80+ built-in generators including names, emails, URLs, and even dinosaurs.
Development
Try it yourself:
$ fakedata --format ndjson -n 3 name email company
Stream thousands of rows to test database performance and API limits. Pipe to a file, count lines, and stop when ready.
Load Testing
Try it yourself:
$ fakedata --stream email country | head -5
Custom Go templates for any output format. Define your own schema and generate JSON, YAML, or any text.
Custom Output
Try it yourself:
$ fakedata -T user.tmpl -n 3
Get Started
FakeData is built for developers who need realistic test data fast.
80+ generators
People, geography, web, time, types, and fun categories
Multiple formats
Tab-separated, CSV, or NDJSON output
Streaming mode
Generate data indefinitely for load testing
Templates
Custom output with Go templates (JSON, YAML, any format)
Deterministic
Use seeds for reproducible results every time
Shell completion
Bash, zsh, and fish support
Install in one line
$ go install matto.club/vetrina/fakedata@latest
$ brew install clubmatto/tap/fakedata
Requires Go 1.21+ or Homebrew.
What Can You Generate?
search for generators here
$ fakedata
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No generators match "". Try one of these:
FakeData Pro
Need to generate data directly in your database? FakeData Pro connects to your database and generates realistic data automatically — no export/import needed.