API Tester

Mini Postman

Test API endpoints with GET, POST, PUT, DELETE — see responses instantly

Query parameters are automatically synced with the URL.

🚀

Ready to test

Enter a URL and click Send to get started

What is API Tester?

The API Tester is a lightweight, browser-based tool for testing RESTful API endpoints. It allows developers to send HTTP requests (GET, POST, PUT, DELETE) and view the responses, headers, and status codes instantly.

How to Use API Tester

Select Method

Choose the HTTP method (GET, POST, PUT, DELETE, PATCH) for your request.

Enter URL

Input the full API endpoint URL you want to test.

Add Headers & Body

Include any required headers (e.g., Authorization) and a JSON payload for POST/PUT requests.

Send and Inspect

Send the request and inspect the response body, status code, and timing metrics.

Key Features

Support for all major HTTP methods (GET, POST, PUT, DELETE, PATCH)

Customizable request headers and JSON body payloads

Clear formatting of JSON response data

Display of HTTP status codes and response times

No account or installation required to test public APIs

Tips & Best Practices

1
Use this tool to quickly verify API responses before integrating them into your frontend code.
2
Remember to include the 'Content-Type: application/json' header when sending POST or PUT requests with a JSON body.
3
Ensure the API you are testing supports CORS (Cross-Origin Resource Sharing) to be called from a browser.

Why Use Our Online API Tester?

Designed for speed, privacy, and precision. All operations occur seamlessly right inside your browser, ensuring your files and private data never touch remote servers. Enjoy lightning-fast processing with zero software installation required.

100% FreeNo subscriptions

Private & SecureLocal client processing

Instant ResultsNo waiting time

Mobile FriendlyWorks on all devices

Frequently Asked Questions

Why am I getting a CORS error?

Since this tool runs in your browser, it is subject to Cross-Origin Resource Sharing policies. The API server must explicitly allow requests from this domain, or you may need a CORS extension for local testing.

Can I test authenticated APIs?

Yes, you can manually add your authentication tokens (like Bearer tokens) in the custom headers section.

Does it save my request history?

To prioritize privacy and simplicity, request history is not persistently saved between sessions at this time.

Can I send form-data or just JSON?

Currently, the interface is optimized for raw JSON payloads, which are standard for most modern REST APIs.

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