Plagiarism Checker
Check your text, URL, or uploaded document for duplicate content and plagiarism across the entire web. Get an instant uniqueness score with source attribution — free, no sign-up required.
Web-wide scan
URL support
Upload .docx/.txt
Uniqueness score
Free & instant
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Paste or upload
Add your text, paste a URL, or upload a .docx or .txt document.
2
Check plagiarism
We scan billions of web pages and compare your content for matches.
3
Review results
See your uniqueness % and click flagged sections to view the source.
Plagiarism Checker
Paste (Ctrl + V) your article below then click Check for Plagiarism!
Paste your URL here
Content is extracted from the URL and loaded into the text area for checking.
Select a file (.docx/.txt)
Supported: .docx and .txt files. Content is loaded automatically for checking.
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Results
Who Uses a Plagiarism Checker?
Students
Check essays, research papers, and dissertations before submission to avoid unintentional plagiarism and academic penalties.
Teachers & Professors
Verify student assignments for originality and detect copied content submitted across different classes or semesters.
Bloggers & Writers
Confirm all published content is original and check whether freelancers or AI tools have produced duplicate text.
SEO Professionals
Detect duplicate content issues that harm search rankings and verify that content is unique before publishing.
Researchers
Ensure journals and papers meet originality standards required by publishers and academic institutions.
Content Agencies
Quality-check content from multiple writers to ensure clients receive fully original, publishable material.
About Plagiarism Checker
The Plagiarism Checker is a free advanced tool that scans your text against billions of indexed web pages and documents to identify duplicate or copied content. Whether you are a writer, student, teacher or SEO professional, detecting plagiarism is critical for maintaining originality, academic integrity and search engine visibility.
Duplicate content can lead to academic penalties, copyright issues and Google filtering your pages from search results. This tool highlights potentially plagiarized sections so you can rewrite or properly attribute them.
How to Check for Plagiarism
- Paste your text into the input field or upload a document
- Click Check Plagiarism
- View highlighted sections with suspected matches and source links
- Review each matched source to determine if attribution or rewriting is needed
Who Uses a Plagiarism Checker
- Students — verify essays and research papers before submission
- Teachers — check submitted work for copied content
- Bloggers and content writers — ensure published content is original
- SEOs — detect duplicate content issues across pages
- Editors — verify freelancer submissions are original
For best results, check content in sections if your text is very long. This tool is completely free with no registration required.
Want to learn more? Read our complete guide: How to Check for Plagiarism Online for Free →
Free Plagiarism Checker vs Turnitin vs Copyscape
| Feature | SEO Stack Tools | Turnitin | Copyscape |
|---|---|---|---|
| Price | Free | $3–$5/submission | $0.03/page |
| Account required | No | Yes (institutional) | Yes |
| Best for | Web content, blogs, quick checks | Academic papers | Web duplicate detection |
| URL checking | Yes | No | Yes (premium) |
| File upload | .docx, .txt | Most formats | Premium only |
| Results speed | Instant | Minutes | Instant |
How to Reduce Plagiarism in Your Writing
- Cite your sources — always attribute quotes, statistics, and ideas to their original author with proper citation format (APA, MLA, Chicago).
- Paraphrase correctly — rewrite ideas entirely in your own words and sentence structure; changing a few words from the original still counts as plagiarism.
- Use quotation marks — when you must include an exact phrase, put it in quotes and add a citation immediately after.
- Take original notes — when researching, write notes in your own words from the start rather than copying passages to rephrase later.
- Run a check before submitting — use this tool to scan your text and review any highlighted matches before publishing or submitting your work.
Frequently Asked Questions
How does the plagiarism checker work?
Your text is broken into sentences and phrases, then compared against billions of indexed web pages to find matching content. Sources that contain matching passages are listed in the results with a similarity percentage. The higher the uniqueness score, the more original your content is.
What is a good uniqueness score?
For original web content and blog posts, aim for 85% or higher uniqueness. Academic papers and research should ideally be above 90% unique. Scores below 70% typically indicate significant copied content that should be rewritten before publication or submission.
Can this tool detect AI-generated content?
This tool checks for plagiarism by comparing text against web sources. If AI-generated content was copied verbatim from an existing web source, it will be flagged. However, freshly generated AI content that does not match indexed pages may not be detected by a standard plagiarism checker. For AI-specific detection, you would need a dedicated AI content detection tool.
Why is my original content showing as plagiarised?
Common phrases, product names, addresses, boilerplate legal text, or widely used quotes may match other websites even in genuinely original writing. Review the matched sources carefully — if they are common phrases rather than copied paragraphs, your content is likely fine. Short sentences and headings often produce false positives.
What file types can I upload?
The tool accepts .docx (Microsoft Word) and .txt (plain text) files. For PDF files, copy and paste the text content into the text area for checking. Most other document formats should be converted to .docx before uploading.
Is there a word limit per check?
Yes — the current word limit is shown above the text area. For longer documents, split them into sections and check each part separately to stay within the limit. The word count badge updates live as you type or paste.
How is this different from Grammarly's plagiarism check?
Grammarly's plagiarism checker requires a paid subscription and is built into their writing assistant. This tool is completely free with no account required and focuses purely on plagiarism detection across the web. You can use both tools together — grammar checking in Grammarly, plagiarism checking here.
Can I check a URL for plagiarism instead of pasting text?
Yes — switch to the "Enter URL" tab and paste the URL of any publicly accessible web page. The tool will extract the page content and load it into the text area, then you can run the plagiarism check as usual. This is useful for checking competitor content or verifying your own published pages.
Is this tool suitable for checking student essays?
Yes — this tool works well for checking student essays against publicly available web content. Note that institutional plagiarism tools like Turnitin also check against private student paper databases which this tool does not access. For academic submission requirements, always check what tool your institution mandates.
Is my text stored after checking?
Your text is processed to perform the plagiarism check and is not permanently stored or shared. For highly sensitive documents such as unpublished research, legal contracts, or confidential business content, you should always be cautious about using any online tool.