Define mock API endpoints with custom HTTP methods, status codes, and JSON responses. Export your API schema as OpenAPI-compatible JSON. Free online API mock generator.
Define mock API endpoints with custom HTTP methods, status codes, and JSON responses. Export your API schema as OpenAPI-compatible JSON. Free online API mock generator. API Mock Generator is a powerful, free online tool built for anyone looking for handy browser-based utilities. It's part of ToolHaven's Bonus Tools collection — a suite of browser-based utilities designed to help you work faster without compromising your privacy.
Unlike cloud-based alternatives, API Mock Generator processes everything locally on your device. Your data never leaves your browser — making it ideal for sensitive or confidential work. There are no file size limits imposed by server bandwidth, and results appear instantly without network delays.
Whether you need to api, mock, endpoint, json, API Mock Generator handles it with ease. No account required, no software to install — just open the tool in any modern browser (Chrome, Firefox, Safari, Edge) on desktop, tablet, or mobile and start working immediately.
Open API Mock Generator and set up your preferences using the controls. Define mock API endpoints with custom HTTP methods, status codes, and JSON....
Configure API Mock Generator's options shown above to customize your result. The tool processes everything locally in your browser with no delay.
Copy or download your API Mock Generator result. Everything was processed locally in your browser — no account needed, no data stored.
Save your work as a downloadable file before closing the tab — most tools don't auto-persist.
Use templates as starting points, not final outputs — customize for your audience.
Bookmark generators you use repeatedly to skip the rediscovery step.
Define mock API endpoints with custom HTTP methods, status codes, and JSON responses. Export your API schema as OpenAPI-compatible JSON. Free online API mock generator. API Mock Generator runs entirely in your browser using JavaScript — your data is never uploaded to any server. The processing happens locally on your device, which means it's both fast and private.
Yes, API Mock Generator is 100% free with no hidden costs. There's no login required, no account to create, no trial period, and no premium tier. You can use it as many times as you want.
Absolutely. API Mock Generator processes everything locally in your browser. Your data never leaves your device — we have no server that could receive or store it. You can verify this by checking the Network tab in your browser's Developer Tools (F12) while using the tool.
Yes, API Mock Generator is fully responsive and works on smartphones and tablets. The interface adapts to your screen size, and since all processing happens in your browser, it works on any device with a modern web browser.
No installation needed. API Mock Generator runs directly in your web browser — Chrome, Firefox, Safari, Edge, or any modern browser. Just open the page and start using it immediately. There's nothing to download, install, or update.
