What is HTTP 414 Status Code (URI Too Long)?

Reliqus Marketing

04 April 2024

HTTP Status Codes
By Ankit Bhatia
Founder & CEO

The internet is full of different error codes that can cause frustration for website owners and users alike. One of these errors is the 414 Status Code, also known as the 414 URI Too Long Error. This error occurs when a server is unable to process a request because the URL or web address is too long.

A rare but notable condition leading to a 414 Status Code can occur when a client incorrectly transforms a POST request into a GET request, appending lengthy query information to the URL.

This situation might also arise if a client is directed to a URI prefix that effectively leads back to a suffix of the same URI, creating a loop. Additionally, a 414 error can signal an attempt by a client to exploit security vulnerabilities by overloading the server with excessively long URLs.

Importantly, a 414 response is cacheable by default, though the method definition or explicit cache controls can modify this.

414 Code References

In the world of web development, understanding how different programming languages and frameworks interpret the 414 Status Code is crucial for diagnosing and resolving issues related to overly long URLs.

Rails HTTP Status Symbol :request_uri_too_long

Go HTTP Status Constant http.StatusRequestURITooLong

Symfony HTTP Status Constant Response::HTTP_REQUEST_URI_TOO_LONG

Python2 HTTP Status Constant httplib.REQUEST_URI_TOO_LONG

Python3+ HTTP Status Constant http.client.REQUEST_URI_TOO_LONG

Python3.5+ HTTP Status Constant http.HTTPStatus.REQUEST_URI_TOO_LONG

These references are key to understanding how to handle this specific status code across different web technologies. Reliqus Consultings team of experts is well-versed in these technologies, providing you with the guidance and support needed to tackle 414 errors efficiently.

When is a 414 status code used?

The 414 status code is primarily used to signal that the URL requested by the client is too long for the server to process, indicating a potential configuration issue. 

Although there’s no standardized maximum URL length, certain browsers and servers impose limits to safeguard against security risks, such as denial-of-service attacks. 

Besides overly lengthy URLs, other scenarios triggering a 414 status code include redirect loops, server attacks and the improper conversion of POST requests into GET requests with extensive query information attached.

These situations highlight the need for efficient URL management and server configuration to avoid such errors.

414 Status Code Common Issues and How to Fix Them

The 414 status code, indicating that a URI is too long for the server to process, can stem from a variety of issues. Understanding these common problems and knowing how to address them can save time and frustration.

Here, we explore three prevalent causes of 414 errors—excessively long URLs, redirect loops, and long query parameters—and provide practical solutions for each.

1. Excessively Long URLs

Excessively long URLs are the most straightforward cause of 414 errors. URLs might become this lengthy due to overly detailed path structures or an attempt to pass too much data via query parameters.

How to Fix:

When faced with an excessively long URL, conduct regular reviews of your site’s URL structure to ensure it remains concise and meaningful. Adopt a human-readable URL design and SEO-friendly, focusing on relevancy and avoiding redundant parameters. 

For dynamic pages that require parameters, consider using URL rewriting techniques to maintain brevity and clarity. 

2. Redirect Loop

A redirect loop occurs when a URL is redirected to another URL, which then redirects back to the original URL, creating an endless cycle. If this loop continues unchecked, the resultant URL can grow with each iteration, eventually triggering a 414 error.

How to Fix:

Regularly audit your website’s redirection rules and logic to ensure they are correctly implemented and do not inadvertently create loops. 

Utilize network monitoring and debugging tools to trace the path of a redirected request, helping you identify and rectify problematic redirects. 

Keeping redirection rules simple and well-documented can prevent loops. In cases where complex redirection is necessary, consider implementing server-side logic to detect and halt potential loops before they cause errors.

3. Long Query Parameters

Long query parameters often result from attempts to pass complex data or multiple pieces of information in a single URL. While this can be necessary for tracking or filtering purposes, it can quickly lead to unwieldy URLs that exceed server limits.

How to Fix:

To mitigate this, consider shortening parameter names, reducing the amount of data passed via URL, or switching to POST requests for data transmission where feasible. This shift not only reduces URL length but can also enhance security by keeping data out of the URL entirely. 

In all these scenarios, the key is to understand the root cause of the excessively long URL and to apply the appropriate strategy to mitigate it. Whether through technical fixes or reconsidering how data is passed between client and server, maintaining concise and efficient URLs is essential for avoiding the 414 “URI Too Large” error and ensuring a smooth user experience.

If navigating server settings seems overwhelming, our technical support team is ready to assist. We can handle these configurations for you, ensuring your site is optimized to prevent 414 errors and other common web issues.

How to fix a 414 URI Too Large error Using Apache and Nginx?

Log in to your server

To address a 414 Status Code issue, it’s essential to access your server’s backend. This can be done through a control panel provided by your hosting service or via SSH for a more direct approach. Ensure you have the correct login credentials and the necessary permissions to make changes.

Once logged in, you’ll need to identify your server type to navigate to the correct settings that might be causing the error. Look for clues such as the presence of a “.htaccess” file or use a Whois Domain Tools site to gather information. If uncertain, don’t hesitate to reach out to your hosting provider for guidance on adjusting the relevant settings.

Find the server configuration file

The server configuration file is a vital component containing settings that directly affect the length of URLs your server can process. This file may have different names and reside in various directories based on your server’s operating system and the web server software in use. 

To adjust these critical settings, you’ll need to explore the advanced configuration settings deeply and locate the directory holding your site’s files. Typically, for server configuration, navigate to your “etc” folder. 

For Apache servers, the file path is usually “/etc/apache2/apache2.conf,” while Nginx servers often use “/etc/nginx/nginx.conf.”

Adjust the configuration file

To tackle the 414 Status Code, you’ll need to open your server’s configuration file in an editor.

If you’re working with an Apache server, search for the `LimitRequestLine` directive. If this setting doesn’t exist, you’re free to add it yourself. It’s recommended to set `LimitRequestLine` to at least 128000, adjusting in multiples of two for higher values if necessary to accommodate your needs. 

For those on Nginx servers, the focus should shift to the `large_client_header_buffers` setting. This directive allows you to control the maximum size and number of header lines in the client request. Adjust the size within a range of 8K to 128K, adhering to multiples of two for any increments above the minimum, ensuring compatibility and performance optimization. 

After making these adjustments, it’s crucial to save your changes. Once saved, upload the modified configuration file back to your server. Following these steps will effectively address the issue at hand. 

You can then check your website once more; the 414 URI Too Long error should now be resolved, restoring normal access and functionality.

What are the Related HTTP Response Headers with 414 HTTP Status Codes?

The related HTTP Response Headers with 414 HTTP Status Codes are listed below.

The 414 Status Code is intricately linked with the concept of content negotiation, a technique that permits the provision of multiple representations of a resource at the same URI, facilitating a more adaptable and efficient web environment. 

In this context, URI refers to a string that serves as a unique identifier for a resource. By allowing different formats or versions of a resource to be available at one URI, content negotiation supports a more dynamic web ecosystem. 

Ultimately, the 414 HTTP Status Code is related to the URI, highlighting the importance of managing the length and structure of these identifiers to prevent errors and improve the user experience.

What are the Other Similar Status Codes to 414 HTTP Status Codes?

Each HTTP status code conveys specific information about the request and its processing status. The 414 HTTP Status Code, indicating that the URI is too long for the server to process, is part of a group of response codes indicating that the request cannot be processed due to client-side issues. 

Let’s delve into some status codes similar to 414, highlighting their meanings and potential implications for web communication.

  • 411 Length Required HTTP Status Code: This status code indicates that the server refuses to accept the request without a defined Content-Length header, which is necessary for the server to process the request properly.
  • 412 Precondition Failed HTTP Status Code: This error is returned when one or more conditions in the request header fields are evaluated as false upon server testing. It is commonly associated with conditional requests that use headers like If-Match or If-None-Match to optimize data transactions.
  • 413 Payload Too Large HTTP Status Code: Similar to the 414 error, the 413 Payload Too Large status code is returned when the request entity is larger than the limits defined by the server; the server might close the connection or prompt the client to reduce the size of the request body if possible.
  • 415 Unsupported Media Type HTTP Status Code: This error occurs when the server refuses to accept the request because the payload format is in a format not supported by the server for the target resource.

Understanding these status codes and their implications can greatly enhance the effectiveness of web development and client-server interactions. Each code provides specific feedback that, when heeded, can lead to more efficient, secure, and user-friendly web applications.


In wrapping up our discussion on the 414 Status Code, it’s clear that understanding and effectively managing URI lengths are crucial for maintaining a seamless user experience. 

At Reliqus Consulting, we emphasize the importance of not only resolving such errors but also implementing proactive measures to prevent future occurrences. Leveraging our expertise can help ensure that your website remains accessible, efficient, and error-free. 

Remember, addressing issues like the 414 Error promptly can significantly enhance user satisfaction and overall website performance.

Frequently Asked Questions (FAQ)

We’ve compiled a list of Frequently Asked Questions (FAQs) to provide further insights and clarify common queries regarding the 414 status code and its associated issues. We aim to help you better understand how to navigate and resolve these errors efficiently.

How do I Fix 414 URI Too Long?

To resolve a 414 error, start by shortening the URL. Additionally, check for and correct any improper redirections that might be contributing to an overly long URL. It’s also worthwhile to modify how data is transmitted, possibly switching from a GET to a POST request if a large amount of data needs to be submitted. 

What is the Maximum Length of a 414 URI?

The maximum length of a URI that can trigger a 414 error varies by server. However, to avoid this issue, most modern browsers and web servers keep the URL under 2000 characters, as URLs longer than this are more likely to cause problems.

What is HTTP Error URL Too Long?

An HTTP error “URL too long” is another way of referring to the 414 status code. It indicates that the requested URL is longer than the server can interpret or process. This is typically the result of an excessively long URL, a long redirection chain, or an extended cookie value that complicates the request.

What is the Browser Compatibility of 414 HTTP Status Code?

The 414 HTTP Status Code is universally compatible across all web browsers, ensuring widespread recognition and appropriate handling of this error. The browsers that support this status code include Chrome, Edge, Firefox, Internet Explorer, Opera, Safari, and Webview Android. 

What is Error 414 in the Grafana Client?

Error 414 in the Grafana client signifies that the URL requested by the client exceeds the length the Grafana server can process. This often requires reviewing and optimizing the query or dashboard causing the issue to ensure the URL length is within acceptable limits.

What is API error 414?

API error 414, also known as “URI Too Long,” occurs when the server receives a request URL from an API call that is longer than it can interpret. To fix this issue, it is recommended to shorten URLs, simplify the URL structure, and ensure that redirects are not creating overly long URLs.

What is the Reason 414 Failed to Establish a TCP Connection?

Reason 414, “failed to establish a TCP connection,” typically refers to a networking issue where the system fails to set up a TCP connection. This can occur due to various reasons, like incorrect networking settings, firewall restrictions, or issues with the network hardware or ISP. It’s not directly related to the HTTP 414 status code, which refers to a URL being too long.

Ankit Bhatia

Founder & CEO at Reliqus

With 12+ years of experience building a web presence for 300+ businesses, Ankit understands how businesses can use technology to increase revenue.

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