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Custom Mock API Creator

Files deleted automatically after 15 minutes Processed on our server

Upload custom JSON or CSV data and get an instant, free public REST API endpoint with full CRUD support, pagination, search, and simulated network delay.

Deploy Your Own Mock REST API in Seconds

Upload a JSON or CSV file or paste data below. We will instantly turn it into a live, CORS-enabled REST API with GET, POST, PUT, and DELETE.

Drop JSON or CSV file here or click to browse (.json, .csv max 2MB)
✨ Free Mock API Features Included:
  • Automatic id generation for records
  • Filter by any field (e.g. ?category=electronics)
  • Pagination (?page=1&limit=10) & Search
  • Simulated network delay (?delay=1000)
  • Full CORS headers enabled for all origins
Ready

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How to Use Custom Mock API Creator

1

Select or Upload

Choose your file or paste your input into the workspace above. Drag and drop is supported.

2

Configure & Process

Adjust options to fit your task. Processing runs immediately with no waiting queue.

3

Download Result

Preview and save your output in one click with no watermarks or sign-up prompts.

Private & Confidential

Browser tools process files locally on your device, and server temporary files are deleted automatically within 15 minutes.

Free & No Registration

Full access to every utility without creating an account, signing in, or hitting paywalls.

Works on Any Device

Responsive layout that runs smoothly on desktop, tablet, and mobile browsers across all operating systems.

Frequently Asked Questions

Is Custom Mock API Creator completely free to use?

Yes, Custom Mock API Creator on KiloToolbox is 100% free with no limits, hidden fees, or account sign-up required.

Are my files safe and private?

Yes. Files are transmitted over an encrypted HTTPS connection to our processing server. Temporary files are deleted automatically within 15 minutes of job completion, and your data is never retained, analyzed, or shared.

Can I use Custom Mock API Creator on mobile phones and tablets?

Yes, KiloToolbox is fully responsive and runs smoothly on iPhone, Android, iPad, Mac, Windows, and Linux.