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Mock data generator. Realistic rows in a click.

Spin up realistic fake test data for your app, spreadsheet or demo. Pick your fields, set the row count, then export CSV or JSON — generated entirely on your device, nothing uploaded.

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A free online tool by Digital Heroes
fields

Generated locally with your browser's crypto RNG — nothing is sent anywhere.

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Pick fields and hit Regenerate.

Test data, without the fake-data SaaS

Choose any mix of 15 field types — from full names and emails to UUIDs, job titles, addresses and lorem sentences — set a row count up to 500, and the generator builds a realistic dataset in under a second using your browser's cryptographic random-number generator. Names, emails and companies stay internally consistent within a row, so email matches the person's fullName. Export straight to CSV for a spreadsheet or database seed, download JSON for API mocking and unit tests, or copy JSON to the clipboard. Everything runs on your device — nothing is uploaded, and it keeps working offline.

§ 02 · what you can do

Everything a data mocker should do.

  • Pick any combination of 15 field types — full names, first/last names, emails, phones, companies, job titles, street addresses, cities, countries, dates, booleans, numbers, UUIDs and lorem sentences.
  • Generate up to 500 rows of realistic fake data in under a second, with row-consistent names and matching emails.
  • Export to CSV to paste directly into Excel, Google Sheets or a database seed script.
  • Download JSON for API mocking, unit tests or front-end prototyping.
  • Copy JSON to the clipboard and paste it straight into your editor or Postman.
  • Toggle all fields on or off in one click to reset your column selection fast.
§ 03 · how to use it

Four steps, no manual.

  1. Check the fields you need — like Full name, Email, Phone or Company. Use the None / All toggle to reset the selection quickly.
  2. Set the number of rows (1 to 500) and click Regenerate.
  3. Review the preview table — it shows the first 100 rows; the full set is included in every export.
  4. Click Download CSV, Download JSON or Copy JSON to use your data anywhere.
§ 04 · faq

Frequently asked questions.

Is the Mock Data Generator free?
Yes — completely free for everyone. No sign-up, no account and no usage limits.
Is it private? Is my data uploaded anywhere?
No upload, ever. The generator runs entirely in your browser on your own device using its built-in crypto random-number generator — nothing is sent to a server.
Does it work offline?
Yes — once the page has loaded, generating and exporting all work without a connection, because every field is produced locally.
How many rows and field types can I generate?
Up to 500 rows per generation, across 15 field types. The preview shows the first 100 rows for speed, and the full set is written into every CSV, JSON or clipboard export.
Is the fake data realistic and safe to use?
Every value is randomly assembled from generic pools and safe placeholder email domains like example.com — it looks realistic for demos and tests but doesn't correspond to real people, so it's safe for seeding databases and prototypes.

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