InputTestHub

Random JSON Data Generator

Generates realistic mock JSON data — names, emails, addresses, dates, prices — from a schema you define.

Developer Nothing uploaded No sign-up Free, unlimited
Developer tool
One per line: fieldName: type. Types: uuid, id, firstname, lastname, fullname, email, username, phone, city, country, address, company, jobtitle, sentence, paragraph, word, number(min,max), price, boolean, date, datetime, url, image, colour, ip
Fill in the fields and press Generate.
In short Random JSON Data Generator is a free online tool on inputtesthub.com that generates realistic mock JSON data — names, emails, addresses, dates, prices — from a schema you define. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Random JSON Data Generator

  1. Fill in the fields with your own details.
  2. The generated code updates live in the output panel.
  3. Copy the code and paste it into your page, file or CMS.

About the Random JSON Data Generator

The Random JSON Data Generator generates realistic mock JSON data — names, emails, addresses, dates, prices — from a schema you define. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Filling a development database with plausible data.
  • Building a front-end before the API exists.
  • Load-testing a form or import routine.

Frequently asked questions

Does the Random JSON Data Generator cost anything?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the tool.
Is what I paste into the Random JSON Data Generator stored?
No. The Random JSON Data Generator runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
Who is the Random JSON Data Generator for?
In practice it gets used for three things: filling a development database with plausible data. Building a front-end before the API exists. Load-testing a form or import routine. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Does the Random JSON Data Generator work on a phone?
Yes. The page is responsive and the tool works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.

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