About the Duplicate Content Checker (Two URLs)
Duplicate or near-duplicate pages split signals and make it harder for search engines to choose which version to show. This duplicate content checker fetches two public URLs from our server, extracts the main text (ignoring navigation and footers where possible) and compares similarity and shared phrases, alongside each page's title, H1 and canonical tag.
The result tells you whether the pages look like duplicates and suggests which one should be canonical based on the signals found. Typical causes include URL parameters, HTTP and HTTPS versions, printer pages, and location or product pages built from one template. Fixes range from a rel=canonical or 301 redirect to rewriting pages so each one has a unique purpose.
How to use it
- Enter the first page URL.
- Enter the second page URL you suspect is similar.
- Review text similarity, shared phrases, titles, H1s and canonicals.
- Apply a canonical, redirect or rewrite based on the verdict.
Frequently asked questions
Does Google penalize duplicate content?
Google has said duplicate content on its own is not grounds for a penalty unless it is deceptive or manipulative. Usually Google picks one version to show and filters the others. The real cost is diluted signals and the risk that Google chooses a version you did not want.
Should I use a canonical tag or a redirect?
Use a 301 redirect when visitors no longer need the duplicate URL, such as an old address. Use rel=canonical when both URLs must stay accessible, for example filtered or tracking URLs. Make sure canonical tags point to an indexable page that returns a 200 status.
Can it check pages on different websites?
Yes, any two public URLs can be compared, including pages on different domains. This can help when your content is republished elsewhere. Pages that require a login or block automated requests cannot be fetched. If someone else copied your page, a canonical tag pointing to your original, or a link back to it, can help search engines identify the source.