API Tester
Send any HTTP request and inspect the full response — right from your browser, with no CORS headaches.
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This online API Tester lets you fire any HTTP request and see the complete response without installing Postman or fighting CORS. Pick a method (GET, POST, PUT, PATCH, DELETE, HEAD or OPTIONS), enter the URL, add custom headers and a request body, then send. Because the request is made server-side, you can call APIs that would block a browser's cross-origin request — so you see exactly what the endpoint returns. The response comes back with the status code, response time, size, pretty-printed JSON, the raw body and every response header. Free, no signup, and you can copy or download the body in one click.
Frequently Asked Questions
What HTTP methods are supported?
All the common ones: GET, POST, PUT, PATCH, DELETE, HEAD and OPTIONS. For POST, PUT, PATCH and DELETE you can include a request body (such as JSON), and for any method you can set custom request headers like Authorization or Content-Type.
Will I hit CORS errors like I do in the browser console?
No. The request is sent from our server, not from your browser, so the same-origin policy and CORS restrictions don't apply. You can test APIs that don't return CORS headers and still see the full response — something a pure in-browser tester can't do.
Can I send authentication headers and a JSON body?
Yes. Add any headers you need (for example, Authorization: Bearer <token> or an API key header) using the header rows, switch to the Body tab to paste a JSON or raw payload, and the tester sends them exactly as entered.
What does the response show?
The status code and text, response time in milliseconds, payload size, HTTP version and content type, plus two tabs: the response body (JSON is automatically pretty-printed) and a table of all response headers. You can copy or download the body.
Do I need to sign up or install anything?
No. It's a free online tool that runs in your browser — no account, no extension and no desktop app. Just open the page and start sending requests.
Is it safe to test internal or private URLs?
The tester only reaches public endpoints — requests to private, loopback or cloud-metadata addresses are blocked for security (to prevent server-side request forgery). Use it for public and internet-reachable APIs.
Does it follow redirects?
By default it shows you the exact response from the URL you entered, including a 3xx redirect. Turn on 'Follow redirects' and it will follow the chain (re-checking each hop for safety) and show the final response plus the redirect path.