Live API Generator
Mock API Playground
Generate realistic REST APIs instantly for testing and development. No backend required.
Instant Setup
24hr Expiry
Free Forever
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Response Preview
Generate an API to see the response preview
Instant Generation
Create mock REST APIs in seconds without any backend setup or configuration.
Realistic Data
Generate realistic mock data based on your JSON schema for accurate testing.
24 Hour Access
Your generated API stays live for 24 hours, perfect for development and testing.
Frequently Asked Questions
Is my JSON data safe and private?
Absolutely! All conversion happens entirely in your browser using JavaScript. Your JSON data never leaves your device or gets sent to our servers. You can even use this tool offline once the page loads.
Can I use this for large JSON files?
Yes! The tool can handle large and complex JSON structures. However, extremely large files (10MB+) might slow down your browser since all processing happens client-side. For best performance, use files under 5MB.
Does it work with nested JSON objects?
Yes! The converter automatically handles nested objects of any depth and creates separate interfaces for each nested structure. It also properly detects arrays and optional properties.
Can I customize the interface names?
The tool generates sensible interface names automatically based on your JSON structure. After copying the generated code, you can easily rename interfaces in your IDE to match your project's naming conventions.
What frameworks is this compatible with?
The generated TypeScript interfaces work with any TypeScript-based framework including Angular, React, Vue, Next.js, NestJS, and more. It's pure TypeScript syntax with no framework-specific code.
Do I need to install anything?
No installation required! This is a browser-based tool that works instantly. Just visit the page, paste your JSON, and get your TypeScript interfaces. No downloads, no setup, no configuration needed.
Can I fetch JSON from an API directly?
Yes! Use the "Fetch JSON" feature at the top of the page. Simply enter any public API endpoint URL, and the tool will fetch the JSON and automatically generate TypeScript interfaces from the response.
Is this tool really free?
Yes! JSONToAll is completely free to use with no hidden fees, registration requirements, or usage limits. All processing happens in your browser, so we don't even store your data.
Is my data safe and private?
Absolutely! All conversion happens entirely in your browser using JavaScript. Your data never leaves your device or gets sent to our servers. You can even use this tool offline once the page loads.
Do I need to install anything?
No installation required! This is a browser-based tool that works instantly. Just visit the page, use the tool, and you're done. No downloads, no setup, no configuration needed.
Can I use this for large files?
Yes! The tool can handle large and complex data structures. However, extremely large files (10MB+) might slow down your browser since all processing happens client-side. For best performance, use files under 5MB.
Ready to Generate Your Mock API?
Create realistic REST APIs instantly for testing and development. No backend setup required. Generate live endpoints with custom JSON data in seconds.