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Understanding HTTP Status Code 301: Moved Permanently

Vishalini Paliwal
~ 5 min read | Published on Mar 28, 2024


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In the realm of web development, HTTP status codes play a pivotal role in communication between servers and clients. Among these, the 301 Moved Permanently status code holds significance, indicating a permanent redirection of a resource. In this comprehensive guide, we'll delve into the intricacies of the 301 error, its causes, handling methods, best practices, and how to test it using various tools.

What is a 301 error?

A 301 error is an HTTP status code that signifies permanent redirection of a resource to a new URL. When a server encounters a 301 status code, it informs the client that the requested resource has been permanently moved to a different location. Consequently, the client should update its bookmarks, links, or caches to the new URL provided in the response header.

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What are the possible causes for a 301 error?

Several scenarios can trigger a 301 error, including:

  1. Change in URL Structure: When a website undergoes restructuring, such as altering the permalink structure or migrating to a new domain, it may necessitate redirecting old URLs to new ones.
  2. Content Consolidation or Archiving: Websites often consolidate or archive content, leading to the redirection of obsolete URLs to relevant, updated pages.
  3. Canonicalization: To address duplicate content issues, websites may implement 301 redirects to canonical URLs, ensuring search engines index the preferred version.
  4. Website Maintenance or Revamp: During website maintenance or revamp, pages might be relocated or removed, warranting 301 redirects to maintain SEO equity and user experience.

How to handle 301 in JavaScript

When dealing with 301 redirections in JavaScript, you can leverage various techniques. Below is a basic example using the window.location object:

// Redirect to a new URL
window.location.href = '<>';

Best Practices for using the 301 status code

To ensure efficient and effective utilization of the 301 status code, consider the following best practices:

  1. Use 301 for Permanent Redirects: Reserve the 301 status code for permanent redirects, indicating that the redirection is intended to be long-lasting.
  2. Update Internal Links: After implementing 301 redirects, update internal links across your website to point to the new URLs, maintaining a seamless user experience.
  3. Implement Redirect Chains Sparingly: Minimize redirect chains, as excessive redirections can impact page load times and SEO performance.
  4. Utilize Redirect Mapping: Create a comprehensive redirect map detailing old URLs and their corresponding new destinations to ensure thorough redirection coverage.
  5. Monitor and Update Redirects: Regularly monitor your website for broken or outdated redirects, and promptly update them to prevent loss of traffic and negative SEO repercussions.

How to test the 301 status code on Postman

Postman provides a convenient platform for testing HTTP requests and responses, including 301 redirects. Follow these steps to test a 301 status code:

  1. Open Postman: Launch the Postman application and create a new request or open an existing one.
  2. Enter Request URL: Input the URL of the resource you wish to test for redirection.
  3. Send Request: Click on the "Send" button to execute the request.
  4. Inspect Response Headers: In the response section, check the status code. If it's a 301, examine the Location header to verify the redirection destination.

How to test the 301 status code in DevTools browser in Chrome

Google Chrome's DevTools offers robust capabilities for debugging and testing web applications, including inspecting HTTP responses for status codes like 301. Follow these steps to test a 301 status code in Chrome DevTools:

  1. Open DevTools: Right-click on the webpage and select "Inspect" or press Ctrl + Shift + I (Windows/Linux) or Cmd + Option + I (Mac) to open DevTools.
  2. Go to Network Tab: Navigate to the "Network" tab within DevTools.
  3. Trigger the Request: Refresh the webpage or perform the action that triggers the HTTP request.
  4. Analyze Response: In the network activity log, locate the relevant request and inspect the response headers to identify any 301 redirects and their destinations.

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Frequently Asked Questions

Q: How does a 301 redirect differ from a 302 redirect?

A: While both 301 and 302 redirects serve to redirect users and search engines to a different URL, the key distinction lies in permanence. A 301 redirect indicates a permanent move, while a 302 redirect signifies a temporary relocation.

Q: Can multiple 301 redirects impact website performance?

A: Yes, excessive 301 redirects, especially in a chain, can adversely affect website performance by prolonging page load times. It's advisable to minimize redirect chains and consolidate redirects where possible.

Q: Does implementing 301 redirects affect SEO?

A: When implemented correctly, 301 redirects can preserve SEO equity by transferring link juice and maintaining page rankings. However, improper implementation or excessive redirections can negatively impact SEO performance.

Q: How can I track 301 redirects and their effectiveness?

A: Utilize web analytics tools such as Google Analytics to monitor traffic patterns and track the performance of 301 redirects. Additionally, regularly audit your website's redirections to identify any issues or opportunities for optimization.

Q: Is it possible to revert a 301 redirect?

A: Yes, you can revert a 301 redirect by removing or modifying the redirection configuration on the server. However, it's essential to assess the implications on SEO and user experience before making any changes.


In the dynamic landscape of web development, understanding the nuances of HTTP status codes like the 301 Moved Permanently is crucial for maintaining website integrity and user experience. By adhering to best practices, diligently testing redirects, and leveraging tools like Zipy for error monitoring and handling, developers can ensure seamless navigation and enhance overall website performance.

For efficient error monitoring and management with session replay capabilities, consider leveraging Zipy's tool to streamline your web development workflow and optimize user experience.

Read more resources on 3xx error status codes

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