API Mock Data Generator
Realistic fake JSON records for testing APIs.
Runs 100% in your browser — nothing is ever uploaded.
What is API Mock Generator?
Generate realistic mock JSON data for your API: users, products, posts with ids, names, emails and dates. Free and 100% client-side. Pick your options and the result is generated instantly — ready to copy straight into your project. Free and unlimited, with no watermarks and no registration — all processing happens right in your browser, so nothing is ever sent to a server.
How to use API Mock Generator
- Open API Mock Generator in your browser — it's free and needs no account.
- Configure the options to match exactly what you need.
- Click the generate button — the result appears instantly.
- Copy the output or download it as a file for your project.
Frequently asked questions
Is API Mock Generator really free?
Yes — API Mock Generator is 100% free with no limits, no watermarks and no registration. You can use it as often as you like, on as many files or inputs as you need.
Is my data safe when I use API Mock Generator?
Absolutely. API Mock Generator runs entirely in your browser using JavaScript — your input is processed on your own device and is never uploaded to any server.
Does API Mock Generator work on mobile devices?
Yes. API Mock Generator works in any modern browser on desktop, tablet and mobile (Chrome, Firefox, Safari, Edge) — there is no app to install.
Is my code uploaded to a server?
Never. Every CodeKit tool runs entirely in your browser with JavaScript. Your code is processed on your device and never touches a network — it even works offline once the page is loaded.
Are these tools really free?
Yes — 100% free, no sign-up, no limits, no watermarks. We keep the site running with minimal, non-intrusive ads.
Is there a file or size limit?
No hard limit. Because processing happens on your machine, the only constraint is your device’s memory. Files of several megabytes work fine.