---
title: TRACE
slug: Web/HTTP/Methods/TRACE
browser-compat: http.methods.TRACE
---

{{HTTPSidebar}}

The **HTTP `TRACE` method** performs a message loop-back test along the path to the target resource, providing a useful debugging mechanism.

The final recipient of the request should reflect the message received, excluding some fields described below, back to the client as the message body of a {{HTTPStatus("200")}} (`OK`) response with a {{HTTPHeader("Content-Type")}} of `message/http`. The final recipient is either the origin server or the first server to receive a {{HTTPHeader("Max-Forwards")}} value of 0 in the request.

<table class="properties">
  <tbody>
    <tr>
      <th scope="row">Request has body</th>
      <td>No</td>
    </tr>
    <tr>
      <th scope="row">Successful response has body</th>
      <td>No</td>
    </tr>
    <tr>
      <th scope="row">{{Glossary("Safe/HTTP", "Safe")}}</th>
      <td>Yes</td>
    </tr>
    <tr>
      <th scope="row">{{Glossary("Idempotent")}}</th>
      <td>Yes</td>
    </tr>
    <tr>
      <th scope="row">{{Glossary("Cacheable")}}</th>
      <td>No</td>
    </tr>
    <tr>
      <th scope="row">Allowed in HTML forms</th>
      <td>No</td>
    </tr>
  </tbody>
</table>

## Syntax

```http
TRACE /index.html
```

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}

## See also

- [HTTP methods](/en-US/docs/Web/HTTP/Methods)


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Syntax

Specifications

Browser compatibility

See also

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Request has body	No
Successful response has body	No
{{Glossary("Safe/HTTP", "Safe")}}	Yes
{{Glossary("Idempotent")}}	Yes
{{Glossary("Cacheable")}}	No
Allowed in HTML forms	No