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Free developer tool

REST API Tester

Test, debug, and inspect RESTful APIs in seconds, right in your browser. Build your request on the left, then read the status, headers, and response body on the right.

Working field

Build and send your API request.

Request
Headers
Query Parameters
Tip: For authenticated APIs, add an Authorization header with your token. The endpoint must allow CORS for browser requests.

Result

Your API response appears here.

Your response status, headers, and body will show here once you enter an API URL and click Send.

This tool is best for quickly checking endpoints, debugging errors, and inspecting responses.

Free Online REST API Tester

Send requests, inspect responses, and debug RESTful APIs without installing anything. This tool keeps the workflow simple: build your request on the left, supporting content below, and the sidebar on the left for popular and related tools.

All HTTP methods

Send GET, POST, PUT, PATCH, DELETE, and HEAD requests with ease.

Headers and params

Add custom headers and query parameters with simple key-value rows.

JSON body editor

Write or paste raw JSON to send with POST, PUT, and PATCH requests.

Private by design

Everything runs in your browser, so your keys and data stay on your device.

How it works

  1. Pick an HTTP method and enter your API URL on the left.
  2. Add any headers and query parameters you need.
  3. For POST, PUT, or PATCH, add a JSON request body.
  4. Click Send to fire the request right from your browser.
  5. Read the status, headers, and response body on the right.

Best practices

  • Double-check your URL and method before sending a request.
  • Validate your JSON body so the server can parse it correctly.
  • Add the right Content-Type header for JSON payloads.
  • Use a Bearer token or API key for authenticated endpoints.
  • Confirm the API allows CORS for browser-based requests.
  • Read the status code first to spot success or error quickly.

Frequently asked questions

What is a REST API Tester?

It is a web-based utility that lets developers send HTTP requests to API endpoints and review the responses in real time. It simplifies debugging and testing RESTful services.

Is this REST API Tester tool free to use?

Yes. This REST API testing tool is entirely free, with no login or subscription required.

Can I use it for secure or authenticated APIs?

Absolutely. You can add authorization headers, like Bearer tokens or API keys, in the Headers section before sending your request.

Can I send JSON payloads?

Yes. The tool supports JSON-formatted request bodies, which is ideal for POST, PUT, or PATCH requests. You can inspect web tokens in your payloads with our JWT Decoder & Encoder.

Is my request data stored or logged?

No. All requests are processed directly from your browser, and no data is stored or transmitted elsewhere.

Does this support HTTPS and public APIs?

Yes. You can test both public and private HTTPS endpoints as long as they allow cross-origin requests (CORS).

Can I use this tool on mobile?

Definitely. The REST API Tester is fully responsive and optimized for mobile, tablet, and desktop devices.

Which HTTP methods are supported?

You can send GET, POST, PUT, DELETE, PATCH, and HEAD requests, so you can cover most common API testing needs.

Need more developer tools? Clean up your payloads with the JSON Formatter & Validator tool, or inspect your tokens with the JWT Decoder & Encoder tool.