WWW vs Non-WWW Checker

What this tool does

Requests both versions over HTTPS and shows where each ends up, flagging sites that serve duplicate content on both.

Who should use it

Site owners fixing duplicate host issues.

How it works

Both hostnames are fetched with redirects; final hosts and first-hop status codes are compared.

How to use it

1. Enter the full address of the page or site, including https://.
2. Press the run button. The check makes live requests from our server and can take up to about 30 seconds.
3. Read the findings first, then open the tables for detail. Each finding has a severity and a suggested fix.
4. Copy or download the results if the tool offers it, fix the issues on your site and run the check again to confirm.

Practical example

If both versions return 200 with no redirect, search engines may index duplicates.

Understanding the results

One variant should 301 to the other.

Limitations

This is a live check of the URL, made from our server; results can differ from what search engines or visitors see from other locations.

Accuracy and report transparency

Findings come from a real HTTP request made by our server. The result panel shows the checked URL, the UTC time of the check and the data source, and separates measured findings from limitations. We do not show random or sample metrics.

Privacy

The URL you enter is used only to make the request and is not stored in our database. Results may be cached for about ten minutes to limit repeat requests, and the checker blocks local and private network addresses. See the Privacy Policy.