About the REST API Tester
The REST API Tester lets you build and send HTTP requests — choosing a method, URL, headers, and body — and instantly inspect the response, all from within your browser using the native fetch API.
It's a fast way to explore an endpoint, verify authentication headers, check response timing, or debug an API without needing to install a dedicated client. Since requests are sent directly from your browser, the target server needs to allow cross-origin requests (CORS) for the call to succeed.
How to Use This Tool
Enter the request URL
Pick a method (GET, POST, PUT, PATCH, DELETE) and enter the endpoint you want to call.
Add headers and a body
Set custom headers as key/value pairs, and a JSON, form, or raw text body for write requests.
Click "Send Request"
The request runs directly from your browser using fetch — no data passes through a server.
Inspect the response
View the status code, response time, headers, and formatted body.
Common Use Cases
Debugging an API Endpoint: Quickly send a request and inspect the exact status, headers, and body an API returns.
Checking Response Times: Measure how long an endpoint takes to respond without setting up a full testing suite.
Verifying Auth Headers: Confirm a bearer token or API key header is being accepted before wiring it into your app.
Exploring a New API: Try out endpoints from documentation without writing any code first.
Why Use This Tool
Runs In Your Browser
Requests are sent directly from your browser via fetch — nothing passes through a third-party server.
Full Header & Body Control
Add custom headers, choose a body type, and format JSON automatically.
Readable Responses
Status, timing, response headers, and a pretty-printed body are all shown clearly.