What is the HTTP 304 Status Code, and How Can It Be Fixed? 

What is the HTTP 304 Status Code, and How Can It Be Fixed? 

Have you ever been browsing the internet, trying to access a website or a specific page, only to be greeted by an unfamiliar message like “HTTP 304 Not Modified”? It can be frustrating and confusing, especially if you’re not familiar with the technical jargon.  

Understanding this message is simpler than you might think. 

We will help you uncover what an HTTP 304 status code is. 

What is 304 Status Code?  

HTTP status codes are responses from a server to a browser’s request, indicating the outcome of the request. They are grouped into five categories: informational (1xx), success (2xx), redirection (3xx), client error (4xx), and server error (5xx). A common status code is 200, indicating a successful request. 

The HTTP 304 status code, “Not Modified,” is a specific type of response in the 3xx redirection category.  

When you encounter an HTTP 304 Not Modified status code while browsing the internet, it means that the resource you’re trying to access hasn’t been modified since the last time you accessed it. This status code is part of the Hypertext Transfer Protocol (HTTP) used for communication between web servers and web browsers. 

To put it simply, when you visit a website, your browser saves a copy of the site’s resources, like images, scripts, and stylesheets, in its cache. This helps to speed up the loading time when you revisit the site because your browser doesn’t need to download these resources again.  

However, if the website hasn’t made any changes to these resources since the last time you visited, there’s no need for your browser to download them again. Instead, it sends a request to the server asking if the resources have been modified. If the server confirms that the resources are the same, it responds with the HTTP 304 Not Modified status code, telling your browser to use the cached versions instead. 

What Causes the 304 Not Modified Status Code?  

The HTTP 304 Not Modified status code can occur due to various reasons, primarily related to issues on the client-side, which is the user’s end. Here are some common causes: 

1. Virus or Malware:

If the user’s browser is infected with viruses or malware, it can corrupt its functionality, including communication with web servers and caching of web pages. 

2. Recent Software Changes:

Installation or uninstallation of software can sometimes corrupt the system registry, affecting the browser’s ability to communicate properly and cache web pages. 

3. Corrupt Application Files:

If there are any corrupt files related to the user’s browser in other applications, it can impact the browser’s ability to save web pages and update information. 

How to fix the 304 Status Code?  

To fix the HTTP 304 Not Modified status code, you can try the following solutions: 

1. Clear Your Browser Cache 

When you visit a website, your browser saves certain elements of that site, like images and scripts, in its cache. This helps the browser load the site faster when you visit it again. However, if the cached version becomes outdated or corrupted, it can lead to the 304 status code. 

To fix this, you can clear your browser’s cache and cookies. This removes the stored data and forces the browser to fetch the latest version of the resource from the server. To do this, go to your browser’s settings, find the option to clear your cache and cookies, and follow the prompts. After clearing the cache, try accessing the website again to see if the issue is resolved. 

2. Flush the DNS 

Your computer uses the Domain Name System (DNS) to translate the website’s domain name into an IP address that it can use to connect to the server. Your computer stores this translation in its DNS cache to speed up future visits to the same website. 

Sometimes, DNS cache issues can occur, leading to the HTTP 304 status code. To fix this, you can flush your DNS cache. This clears out the stored DNS translations and forces your computer to fetch new translations from the DNS server. 

To flush the DNS cache, open the command prompt on your computer and type “ipconfig /flushdns” (without quotes), then press Enter. This will clear your DNS cache and may resolve the 304 status code issue. 

3. Check Your Redirect Instructions 

After the browser sends a request to a website, the server may respond with a redirect instruction, telling the browser to go to a different location to fetch the requested resource. However, if the redirect instructions are incorrect or conflicting, it can result in the 304 status code. 

To fix this issue, you should check your website’s configuration and ensure that your redirect rules are correctly set up. This includes checking for any conflicting rules that might be causing the browser to receive conflicting instructions. By ensuring that your redirect instructions are correctly configured, you can help prevent the 304 status code from occurring.Top of Form 

Web hosting can impact how websites handle redirect instructions. If the server is configured incorrectly or has issues, it can send wrong redirect instructions to the browser, leading to a 304 status code. For instance, if the server has conflicting rules or is mismanaged, it might send conflicting instructions to the browser. To fix this, it’s crucial to ensure the hosting environment is correctly set up to handle redirects and provide the right content to users. 

4. Run a Malware Scan 

Viruses or malware on your computer can disrupt various functions, including your browser’s ability to communicate with websites properly. This interference can lead to the 304 status code when trying to access certain web resources. To address this issue, it’s important to run a full system scan using reputable antivirus software. 

This scan will help detect and remove any malware that may be causing the problem. Once the malware is removed, your browser should be able to function properly again, reducing the likelihood of encountering the 304 status code in the future. 

5. Disable Browser Extensions: 

Browser extensions are additional software components that add functionality to your web browser. While these extensions can be useful, they can also sometimes cause conflicts that result in the HTTP 304 status code. 

To troubleshoot this issue, you can try disabling your browser extensions one by one to see if the problem is resolved. Start by disabling one extension, then try accessing the website again. If the 304 status code persists, re-enable the extension and try disabling another one. Repeat this process until you identify the extension causing the conflict. 

Once you’ve identified the problematic extension, you can either disable it permanently or look for updates or alternatives that are compatible with your browser and do not cause conflicts. 


When encountering the HTTP 304 Not Modified status code, understanding its cause and resolution can help streamline your browsing experience. 

To resolve the issue, you can clear your browser’s cache and cookies, flush the DNS cache, check and fix any conflicting redirect instructions, run a malware scan to remove any harmful software, and disable problematic browser extensions.  

Additionally, ensuring your hosting environment is correctly configured can prevent incorrect redirect instructions, thereby reducing the likelihood of encountering the 304 status code. 

BigRock’s managed hosting services can help you avoid such issues. Connect with u today and start a smooth online journey for your business. 


Web hosting specialist with a knack for creativity and a passion for baking, serving up tech solutions with a side of sweetness.