www Redirect Checker

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www Redirect Checker

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About www Redirect Checker

A www Redirect Checker tool is used to determine whether a URL properly redirects from the "non-www" version to the "www" version (or vice versa). This is important for SEO and ensuring a consistent user experience. Here’s a detailed overview of how such a tool works:

Step-by-Step Process

1. User Input:

  • The user provides the URL to check, typically the root domain (e.g., `example.com`).

2. Construct URLs:

  • The tool constructs both versions of the URL: the "non-www" version (e.g., `http://example.com`) and the "www" version (e.g., `http://www.example.com`).

3. Send HTTP Requests:

  • The tool sends HTTP requests to both the "non-www" and "www" URLs.
  • It follows redirects, if any, to determine the final destination URL.

4. Analyze Redirects:

  • The tool analyzes the HTTP responses to check if a redirect occurs.
  • It looks at the HTTP status codes (e.g., 301, 302) and the `Location` header in the responses to determine the redirect target.

5. Check Consistency:

  • The tool verifies whether the "non-www" version redirects to the "www" version or vice versa.
  • It also checks if the redirects are consistent and whether they eventually lead to the same final URL.

6. Display Results:

  • The tool displays the results, indicating whether the redirects are set up correctly.
  • It may show the sequence of redirects, final URLs, and any issues detected.


  • URL Construction: The tool constructs both the "non-www" and "www" versions of the URL.
  • HTTP Requests: The `requests.get` function is used to send HTTP requests and follow redirects.
  • Redirect Analysis: The tool captures the final URL after following redirects and the history of all intermediate redirects.
  • Results Display: The results are displayed, showing the initial URL, final URL, and the redirect history for both versions.

Advanced Features

  • HTTPS Support: Checking redirects for both HTTP and HTTPS versions of the URLs.
  • Custom User-Agent: Allowing the tool to specify a custom User-Agent header to mimic different browsers or bots.
  • Redirect Chain Analysis: Providing a detailed analysis of the entire redirect chain, including status codes and intermediate URLs.
  • Handling Edge Cases: Managing edge cases such as infinite redirect loops, mixed content issues, and different behavior for different HTTP methods (GET, POST).

Practical Applications

  • SEO Optimization: Ensuring consistent URL structures to avoid duplicate content issues and improve search engine rankings.
  • User Experience: Providing a seamless experience for users by ensuring they are always redirected to the correct version of the site.
  • Website Configuration: Verifying that web server configurations (e.g., Apache, NGINX) are correctly set up to handle redirects as intended.
  • Monitoring and Maintenance: Regularly checking redirects to ensure they remain functional after website updates or server changes.

By understanding and implementing the steps outlined above, a www Redirect Checker tool can effectively determine the correctness and consistency of URL redirects, ensuring optimal website performance and user experience.