Webhook Tester

Construct and preview HTTP requests

Webhook Tester is a free online tool from BrowserUtils that construct and preview http requests. It runs entirely in your browser — your data never leaves your device. No account required.

This is a client-side request builder. It constructs and previews HTTP requests but does not send them. For receiving real webhooks, you need a server-side endpoint (e.g., webhook.site, requestbin.com).

Your Browser Info (sample incoming request)

Request Builder

Headers

Body

Raw Request Preview

POST /webhook HTTP/1.1
Host: api.example.com
Content-Type: application/json
Authorization: Bearer token123
Content-Length: 82

{
  "event": "user.created",
  "data": {
    "id": 1,
    "name": "John Doe"
  }
}

How to use Webhook Tester

1 Paste or type your input into the editor above.
2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
3 Copy the result with one click or continue editing your input.

About Webhook Tester

Free online webhook tester and HTTP request builder. Construct HTTP requests with custom headers and body, preview the raw request, and see your browser information as a sample request. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.

Webhook Tester specs

Runtime: 100% client-side (browser)
Built on: WHATWG URL API and Headers/Fetch standards as implemented by modern browsers
Cost: Free — no account, no rate limits, no usage caps
Browser support: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
Part of: 299 developer tools on BrowserUtils (100% client-side)

Questions

Can this tool receive real webhooks?

This is a client-side tool that helps you construct and preview HTTP requests. For receiving real webhooks you need a server-side endpoint. This tool shows your browser info as a simulated incoming request and lets you build request configurations.

What is a webhook?

A webhook is an HTTP callback that sends data to a specified URL when a specific event occurs. Unlike APIs where you poll for data, webhooks push data to your endpoint automatically, making them ideal for real-time notifications and integrations.

Can I set custom headers in the webhook tester?

Yes, you can add any number of custom HTTP headers as key-value pairs. This is useful for testing Authorization headers, Content-Type, and other headers your API endpoint expects.

Does the webhook tester send actual HTTP requests?

The tool constructs and previews the request configuration. It shows you the raw HTTP request that would be sent, which you can then use with curl or your HTTP client of choice.

Embed this tool

Copy this code to embed the tool on your website. Adjust the height to fit your layout.

<iframe src="https://www.browserutils.dev/embed/webhook-tester" width="100%" height="500" frameborder="0" title="Webhook Tester"></iframe>

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