How to Check If Your Website Has Duplicate Content

What Counts as Duplicate Content

Duplicate content is substantial blocks of text that appear in more than one location on the internet. "Location" means a different URL. The same content on example.com/page and www.example.com/page is duplicate because the URLs are technically different, even though they serve the same page.

Exact duplicates are obvious. Near-duplicates (pages with minor differences like different dates, ads, or boilerplate text) are also problematic. Google's Panda algorithm and Helpful Content system target sites with significant duplicate content.

Internal vs External Duplicates

Internal duplicates occur when the same content appears on multiple URLs within your site. Common causes: URL parameters (tracking codes, sort options), printer-friendly pages, www vs non-www, HTTP vs HTTPS, trailing slash variations, and session IDs in URLs.

External duplicates occur when the same content appears on multiple websites. This happens with syndicated content, scraped content, manufacturer product descriptions used across multiple retailers, and press releases distributed to multiple outlets.

Finding Duplicate Content

Google Search Console's Pages report includes a "Duplicate without user-selected canonical" status. This shows pages Google considers duplicates where you have not specified a preferred version. Review this report monthly.

Copyscape (copyscape.com) searches the web for copies of your content. Enter a URL to find external duplicates. The free version shows matching sites; the premium version shows detailed comparison.

Siteliner (siteliner.com) scans your entire site for internal duplicates. It identifies pages with significant content overlap and calculates a duplicate content percentage. Aim for less than 10% internal duplication.

Our duplicate title and description checker identifies pages with identical or very similar titles and meta descriptions, which often indicate duplicate content issues.

Fixing Duplicate Content

Canonical tags: Add <link rel="canonical" href="https://example.com/preferred-page"> to duplicate pages. This tells search engines which version to index and rank. Self-referencing canonicals on all pages prevent potential duplicates.

301 redirects: Redirect duplicate URLs to the preferred version. Redirect http://example.com/page to https://example.com/page, and www.example.com/page to example.com/page. Our redirect checker verifies redirect implementation.

URL parameter handling: Configure Google Search Console parameter handling to tell Google which parameters create duplicates. Use robots.txt or meta robots to prevent crawling of duplicate parameter URLs.

Content syndication: When publishing syndicated content, request canonical tags pointing to your original. Publish on your site first, wait for indexing, then syndicate. Include a link back to the original in syndicated versions.