Browser REST Client
Browser fetch
REST Client
Send a simple browser fetch request to CORS-enabled APIs and inspect the response.
Browser CORS rules apply. APIs that do not allow browser requests may fail even when the endpoint works from a server.
Usage guide
Test simple browser HTTP requests and inspect the response
A lightweight REST client is useful for checking public or development APIs directly from the browser. Browser security rules still apply, so a valid API can fail in a browser when CORS policy does not allow the origin.
How to use REST Client
- 1.Choose the HTTP method, enter the endpoint URL, and add only the headers or body required for the test.
- 2.Send the request and inspect the status, response headers, and returned body.
- 3.Compare the browser result with API documentation and server logs, especially when authentication or CORS is involved.
Examples
- Send a GET request to a public JSON endpoint to confirm connectivity and response shape.
- Test a POST payload against a development API with a non-sensitive sample body.
- Compare a CORS failure in the browser with the same request from a server-side client.
Limitations and notes
- Do not paste production secrets, private API keys, bearer tokens, or customer data into casual testing tools.
- CORS is enforced by browsers; a request that works from curl or a server can still be blocked in front-end JavaScript.
Why does an API work in curl but fail here?
The browser may enforce CORS restrictions that do not apply to curl or server-to-server requests.
Can this replace a full API testing suite?
It is useful for quick requests, but complex authentication, environments, scripting, test collections, and automated assertions usually require a dedicated API client or test framework.
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How the rest client works
Paste or enter the code, data, or value you want to inspect.
The tool processes it locally in your browser.
Copy the formatted output or converted value for your project.
Frequently Asked Questions
Is the rest client free?
Yes. It is free and does not require an account.
Is my code sent to a server?
No. These developer tools run locally in your browser.
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