Copyscape
Copyscape is a web-based plagiarism detection tool that checks whether published text appears elsewhere on the internet.
Key takeaways
- Copyscape detects duplicate content on the web by URL or pasted text.
- Use it to protect content originality and reduce content theft.
- Free version checks published pages; Premium checks drafts.
- Matches may include quotes, boilerplate, or syndicated content—review manually.
- Not a ranking tool—use it for plagiarism detection, not SEO scoring.
For SEO teams, Copyscape helps identify duplicate or copied content before publication and monitor unauthorized reuse after publication.
What Copyscape Is Used For
- Check published pages for duplicate content – Enter a URL to see where its text appears elsewhere.
- Scan unpublished drafts – Use Copyscape Premium to paste text and check before publishing.
- Monitor content theft – Set up batch searches to detect unauthorized copies of your content.
- Verify content originality – Ensure new or AI-generated content isn't copied from the web.
- Flag syndicated content – Identify pages that may need canonical tags or attribution.
Quick Start Workflow
- Go to Copyscape.com.
- Enter a URL (free) or paste text (Premium) into the search box.
- Click "Go" to run the check.
- Review results – each match shows the source URL and percentage of similarity.
- Take action – if duplicate content is found, consider rewriting, adding a canonical tag, or contacting the site owner.
When Not to Start Here
- If you need an SEO ranking tool – Copyscape does not measure keyword difficulty or search rankings.
- If you only check published URLs – The free version won't catch unpublished drafts; use Premium for that.
- If you treat every match as a legal issue – Copyscape results are a starting point; quotes, boilerplate, and syndicated text can also trigger matches.
- If you expect academic plagiarism detection – Copyscape is designed for web content, not academic papers or offline documents.
Alternatives
| Tool | Key Difference |
|---|---|
| Plagiarism Checker | Free, basic text comparison for web content. |
| Grammarly | Plagiarism detection plus grammar and style checking. |
| Quetext | Deep search technology with color-coded results. |
| Turnitin | Academic-focused plagiarism detection (not for web content). |
Next step
FAQ
Is Copyscape free?
Copyscape offers a free version that checks published web pages by URL. The Premium version (paid) allows checking pasted text and unpublished drafts.
Can Copyscape check AI-generated content?
Yes, Copyscape can check AI-generated text for copied material from the web, as stated in their FAQ.
Does Copyscape affect SEO rankings?
No, Copyscape is a plagiarism detection tool, not an SEO ranking tool. It helps identify duplicate content issues but does not directly influence rankings.
Related topics
Sources
- Copyscape FAQ — Primary source for tool features and use cases.
- Wikipedia: Copyscape — Background information such as launch year and company.
- Google Search Central — Official guidance on duplicate content and canonicalization.
Reviewed by Lucía Marín, Founding editor.