API Tester
Send HTTP requests to any REST API with CORS proxy, response timing, and request history.
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What is API Tester?
API Tester is a lightweight browser sandbox for testing REST APIs. It lets you configure HTTP methods, headers, and request bodies, running API requests via a local proxy.
How to use API Tester?
1
Enter the target API endpoint URL and select HTTP method.
2
Add custom headers and paste the request body if needed.
3
Click "Send Request" to trigger execution.
4
View the color-coded response headers, status codes, and execution timings.
Interactive Example
Triggering an API requestJSON
Input / Sample Source
GET https://jsonplaceholder.typicode.com/posts/1Output / Result
Status: 200 OK
Body: {"userId": 1, "id": 1, "title": "delectus aut autem"}Benefits & Features
✓
Full API WorkspaceSupports GET, POST, PUT, DELETE, and custom parameters.
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CORS BypassBuilt-in local proxy options to bypass browser CORS blocks.
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History TrackingAuto-saves requests to quickly repeat tests.
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JSON Body FormatFormats JSON payloads automatically.