Mock data generatorGenerators

Mock data generator. Test rows in a second.

Write one field per line, such as email: email or plan: enum(free, pro). Get up to 1,000 rows as JSON, JSON Lines or CSV, with copy and download. A seed makes the same rows every time. Nothing leaves your browser.

Cost to you

Free

Runs in your browser. No signup, no API call, no limit per hour.

browser
runs in
none
API calls
none
account

Use it now

Use the Mock data generator here

It runs in your browser. Nothing you type is sent anywhere, there is no signup and no limit.

Loading the tool.

Run it from your agent

Copy one prompt, give it to your agent.

Fill in the placeholder, paste it, and the agent runs the same job with current data on your looot account and shows the cost.

  • You give it: a field list with types, a row count and a seed.
  • Billed per call, nothing while your agent is idle.
  • The agent shows the price before it calls.
Prompt: Mock data generator
Use looot to build test fixtures for my API: [describe the records]. 1. Set up https://looot.ai/skill.md. 2. Write the field list with a type per field. 3. Make 50 rows with example.com emails and placeholder names, as JSON. 4. Run my agent's tests against the rows and report any field that breaks.

Give this to your agent
Setup command
set up looot - https://looot.ai/skill.md

What comes back

What your agent gets from mock data generator

Field names as the providers return them. The exact set varies by endpoint, and your agent reads it from the catalog.

  • rows as JSON
  • rows as JSON Lines
  • rows as CSV with a header
  • the same rows for the same seed

Use it for

What people do with mock data generator

  • Seed a dev database

    Fill a local table with rows that look real without copying production data.

  • Keep real people out

    Test with placeholder names and example.com emails, never customer records.

  • Agent fixtures

    Give an agent a fixed set of rows to test against, the same every run.

  • Demo a UI

    Load a table or a chart with enough rows to see how it looks.

Set up once

Three steps. Your agent does the rest.

Keep going

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FAQ

Questions about mock data generator

name, first_name, last_name, email, uuid, date, datetime, integer, number, boolean, enum, company, city, country, url and text. Enums take values in brackets, numbers take a range: age: integer(18, 90).

Up to 1,000 per run. Change the seed to get a different set.

The same field list, row count and seed always give the same rows, so tests stay stable. New seed gives a new set.

No. They use example.com, example.org and example.net, domains reserved for examples, so no real inbox gets mail.

A JSON array, JSON Lines with one object per line, or CSV with a header row. CSV cells that start with = + - or @ are escaped so a spreadsheet does not run them.

Yes. It runs in your browser, needs no account and has no limit.
For agents
tool
Mock data generator
category
Generators
input
A field list with types, a row count and a seed
output
rows as JSON, rows as JSON Lines, rows as CSV with a header, the same rows for the same seed
price
per call, read live from the catalog on the web page
web tool
runs in the visitor's browser, no API call, free and unlimited
schedule
on demand
setup
https://looot.ai/skill.md
llms.txt
https://looot.ai/llms.txt
updated
2026-10-14
markdown /free-tools/mock-data-generator.md

Run mock data generator from your own agent.

Start your workspace, top up, and paste the prompt into the agent you already use. It runs the job with live data and shows the cost first.

Start your workspace See all free tools