What does HTTP 204 mean?

HTTP 204 No Content means the server successfully processed the request but has no content to return in the response body. The request worked correctly. There is just nothing to send back. It is most commonly used for actions like saving a form, deleting a resource, or submitting tracking data where the client does not need to receive any data in return.

Is HTTP 204 an error?

No. HTTP 204 is not an error. It is a success code in the 2xx range. A 204 response means the server processed your request successfully. The only distinction from a 200 OK is that the server intentionally returns no response body. If you are seeing 204 responses and your application is not behaving correctly, the issue is usually that your client-side code expects a body and does not handle an empty response gracefully.

What is the difference between HTTP 200 and HTTP 204?

HTTP 200 OK means the request succeeded and the server is returning content in the response body. HTTP 204 No Content means the request succeeded but the server is intentionally not returning any content. Use 200 when you need to send data back to the client, such as a JSON response. Use 204 when the operation succeeded but there is nothing meaningful to return, such as after a DELETE request or a background save.

Does HTTP 204 affect SEO?

A 204 response on a URL that Google is trying to crawl can prevent that page from being indexed because there is no content in the response for Google to evaluate. If your important pages are accidentally returning 204 instead of 200, they will not rank. For API endpoints and tracking pixels this is expected behaviour. For actual web pages, a 204 response is almost always a configuration mistake that should be investigated and corrected.

What is an HTTP 204 Status Code? Everything You Need to Know

What Does the HTTP 204 Status Code Mean?

The HTTP 204 status code means No Content. It is part of the 2xx family of responses, which all indicate that the request was received and processed successfully. The difference between 204 and the more common 200 OK is simple: with a 200 response the server returns data in the body. With a 204 the server intentionally sends nothing back.

Think of it like sending a letter asking someone to update your contact details. A 200 response would be them writing back to confirm the update and listing your new details. A 204 response is them making the update silently without sending any reply. The job got done. There is just nothing to say about it.

✓ 204 No Content Part of the 2xx Success Range Not an Error

According to the official HTTP specification defined in RFC 9110, a 204 response must not include a message body. If the server sends a body with a 204 response, clients should ignore it. The response may include header fields but the body must be empty.

How the HTTP 204 Response Works Under the Hood

When a client sends a request to a server, the server processes it and sends back an HTTP response. Every response has a status line, headers, a blank line, and an optional body. For a 204 response, that optional body is intentionally absent.

The response looks something like this in raw HTTP format:

HTTP/1.1 204 No Content
Date: Mon, 10 Mar 2026 12:00:00 GMT
Server: Apache/2.4
Connection: keep-alive

// No body follows. Response ends here.
      

The important detail here is that the connection stays alive. A 204 does not close the connection or signal anything wrong. The server is simply saying it processed the request and has nothing to add. The client receives this, sees 204, and should continue operating normally without expecting to parse any response content.

💡 Important Technical Note

A 204 response must never include a Content-Length header with a value greater than zero, and it must never include a message body. Some older server implementations incorrectly send a Content-Length header with 204 responses. Most modern clients ignore this but it can cause confusion in strict HTTP parsing environments.

HTTP 204 vs 200 vs 201 vs 404: What Is the Difference?

Understanding where 204 sits relative to other status codes helps clarify when each one is appropriate and what each one tells you about what happened with a request.

200 OK

Request succeeded
Server returns content in the body
Used for GET requests returning data
Used for POST requests that return a result
Most common successful response

204 No Content

Request succeeded
Server intentionally sends no body
Used for DELETE requests with nothing to confirm
Used for PUT or PATCH updates that need no reply
Used for tracking and telemetry endpoints

201 Created

Request succeeded and created a new resource
Returns a Location header pointing to new resource
Often used for POST requests that create records
May include body with the newly created resource
More specific than 200 for creation actions

404 Not Found

Request failed because resource does not exist
Server returns an error body explaining the issue
Indicates the requested URL has no matching resource
Affects SEO negatively for indexed pages
Should be resolved or redirected if unintentional

When Should You Send an HTTP 204 Response?

The 204 response is the correct choice in several specific scenarios. Using it appropriately makes your APIs cleaner and more semantically accurate. Here are the cases where 204 is genuinely the right response to send.

DELETE Requests Where Nothing Needs Confirming

When a client sends a DELETE request to remove a resource and the deletion succeeds, there is usually nothing meaningful to return. The resource is gone. A 204 tells the client the deletion was successful without forcing the server to construct an unnecessary response body. Some APIs return a 200 with a confirmation message like "Resource deleted successfully" but this is often unnecessary noise. A 204 is cleaner and more accurate.

PUT and PATCH Updates With No Response Needed

When a client updates a resource via PUT or PATCH and the update succeeds but the client does not need to see the updated state, a 204 is appropriate. If the client already knows what it sent and does not need the server to echo it back, a 204 avoids an unnecessary round trip of data. If the client does need to see the updated state, a 200 with the updated resource in the body is the better choice.

Tracking Pixels and Analytics Beacons

This is one of the most common real-world uses of 204 that most web users never think about. When your browser loads a webpage, it often fires tiny invisible tracking requests to analytics servers. These servers receive the event data, record it, and respond with 204 because there is nothing to send back to the browser. Google Analytics, Facebook Pixel, and many other tracking tools use this pattern extensively.

Form Submissions That Do Not Navigate

In single-page applications where a form submission should save data without navigating to a new page or refreshing the current one, a 204 tells the JavaScript that the save was successful and nothing in the UI needs to change based on a server response. The front-end code handles the user experience update independently.

Common Causes of Unexpected HTTP 204 Responses

When a 204 shows up somewhere you did not expect it, there are a handful of causes that account for the vast majority of cases.

Misconfigured Server Route or Controller

The most common cause of an unexpected 204 is a server-side route or controller method that is returning without explicitly setting a response body. In many web frameworks, returning nothing or returning null from a controller will cause the framework to send a 204. If you expected a JSON response and got a 204 instead, check whether your controller method is actually returning the data or accidentally exiting early.

Middleware Intercepting the Response

Authentication middleware, caching middleware, and CORS handling layers sometimes intercept requests and return early responses. A preflight CORS request, for example, can legitimately return a 204. If you see 204 responses on requests that should not be preflight requests, check whether a middleware layer is handling those requests and returning early.

Empty Database Query Results Being Mishandled

Some API implementations are coded to return 204 when a database query returns no results, treating "found nothing" the same as "nothing to return." This is technically incorrect. The right response for "the resource does not exist" is 404. The right response for "the query succeeded but found zero matching records" is arguably 200 with an empty array in the body. A 204 for empty results surprises clients that are not expecting it.

OPTIONS Preflight Requests in CORS

When a browser sends a cross-origin request, it often first sends an OPTIONS preflight request to check whether the actual request is permitted. Servers typically respond to these preflight requests with a 204 or 200. Seeing 204 on OPTIONS requests in your network tab is completely normal and expected behaviour, not a problem.

Server logs and network requests showing HTTP 204 No Content responses being diagnosed and troubleshot in a web development environment — Examining HTTP responses in browser developer tools is the first step when diagnosing unexpected 204 No Content responses.

Does an HTTP 204 Status Code Affect SEO?

This depends entirely on where the 204 is appearing. The answer is different for API endpoints versus actual web pages.

For API Endpoints and Tracking URLs

204 responses on API endpoints, tracking pixels, and background data submission URLs have zero SEO impact. Googlebot does not attempt to index these URLs as web pages. Even if it does crawl them, a 204 will simply result in no content being indexed, which is the expected outcome for those endpoints.

For Actual Web Pages Googlebot Tries to Crawl

If a URL that Google is trying to index as a web page returns a 204, that page will not be indexed. There is no content for Google to evaluate or store. This is a problem if it is happening on pages that should be returning content. It is effectively invisible to search engines, which means it contributes nothing to your organic visibility.

If you find pages returning 204 in Google Search Console as pages with coverage issues, you need to investigate your server configuration to understand why those pages are returning empty responses. This is one of many technical SEO issues that can silently drain your organic performance. For a broader look at technical SEO health for your site, our free SEO audit covers response code issues alongside the other factors that affect your Google rankings.

CORS Preflight 204 Responses

The 204 responses you see on OPTIONS preflight requests in your network tab do not affect SEO at all. Google does not crawl or index OPTIONS requests. These are purely browser-to-server communications that handle cross-origin permissions before the actual request fires.

⚠ SEO Warning

If you are running a crawl audit and discover that important pages on your site are returning 204 instead of 200, treat this as an urgent technical SEO issue. Those pages are not indexable and are effectively invisible to Google regardless of how many backlinks they have or how well-optimized the content would be if it were being served correctly.

How to Troubleshoot an HTTP 204 Response

When you encounter a 204 that you did not expect and it is causing problems, here is a systematic approach to diagnosing what is happening.

Step 1: Check the Browser Developer Tools

Open your browser developer tools, go to the Network tab, and filter by the URL or type of request you are investigating. Look at the full response headers to confirm it is actually a 204 and not a different code. Check whether there is any response body at all. Also look at the request headers to make sure the request is being sent correctly in the first place.

Step 2: Check Your Server-Side Controller or Route Handler

If this is a custom endpoint, look at the code that handles the request. Most web frameworks will send a 204 if a controller returns nothing, returns null, or exits without explicitly setting a response. In PHP:

// This may result in a 204 in some frameworks:
function updateRecord() {
    DB::table('users')->update(['name' => 'New Name']);
    // Returning nothing here
}

// Better: explicitly return a response
function updateRecord() {
    DB::table('users')->update(['name' => 'New Name']);
    return response()->json(['status' => 'updated'], 200);
}
      

Step 3: Check for Middleware Early Returns

Review the middleware stack for the route in question. Authentication middleware that rejects a request before it reaches your controller, CORS middleware handling preflight requests, and caching layers can all return responses before your controller runs. Add logging to identify exactly which layer is generating the 204 response you are seeing.

Step 4: Check Your Web Server Configuration

In some cases, the web server itself (Apache, Nginx, Caddy) may be configured to return 204 for certain request types or URL patterns. Review your server configuration files for any rules that might match the URLs returning unexpected 204 responses.

Step 5: Handle 204 Correctly on the Client Side

If the 204 is intentional but your client code is not handling it correctly, the fix is on the front end. Make sure your fetch or XMLHttpRequest code does not attempt to parse the response body when a 204 is received:

fetch('/api/update', {
  method: 'PUT',
  body: JSON.stringify(data)
})
.then(response => {
  if (response.status === 204) {
    // Success, no body to parse
    console.log('Update successful');
    return;
  }
  return response.json(); // Only for responses with a body
});
      

Real-World Examples of HTTP 204 in Action

Understanding where you actually encounter 204 in the wild makes it easier to recognize when it is expected and when it is not.

Google Analytics and Tag Manager

If you open the Network tab in your browser while visiting any website using Google Analytics 4, you will see requests to Google's collection endpoints returning 204. This is completely intentional. The page sends your browsing event data to Google, Google records it, and responds with 204 because there is nothing to send back to the page. This is one of the most ubiquitous uses of HTTP 204 on the web today.

REST APIs for Resource Deletion

Many well-designed REST APIs follow the convention of returning 204 for successful DELETE operations. If you call DELETE /api/users/123 and the user is removed, the server sends 204. The user is gone. There is nothing to return. Many popular APIs including the GitHub API follow this pattern for deletion endpoints.

WebSocket Upgrade Failures

In some implementations, a failed WebSocket upgrade attempt can result in a 204 being returned if the server handles the fallback to HTTP incorrectly. This is a less common scenario but worth checking if you are seeing unexpected 204s on WebSocket-related URLs.

WordPress REST API

WordPress's built-in REST API uses 204 appropriately in several places, including when content is deleted via the API and when auto-save operations complete successfully without needing to return the full post object. If you are building a headless WordPress application and seeing 204 responses from the REST API, check whether the endpoint you are hitting is designed to return data or designed to perform an action with no return value. Our WordPress SEO guide covers how the REST API interacts with technical SEO in more detail.

✓ Quick Summary

HTTP 204 No Content is a success response meaning the request worked but there is no data to return. It is appropriate for DELETE operations, silent updates, and tracking endpoints. It is not an error. It only causes problems when it appears on URLs that should be returning content, in which case you need to investigate your server-side code or configuration to find where the empty response is originating.