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Plagiarism Checker Online — Free
Compare your text with a reference document for free. Highlight matching phrases and download a report with Complete PDF. No internet-wide search.
Paste your writing, or import a document.
Paste the source you want to compare against.
TXT, DOCX and text-based PDF · 10 MB per file · 150 PDF pages · 300,000 characters per box
REFERENCE SIMILARITY
Highlighted words occur in matching phrases in the supplied reference. Overlapping matches are counted once.
How to use Plagiarism Checker
- Paste or import the document you want to check.
- Add reference text from a document or source you are allowed to use.
- Choose a minimum phrase length, compare, and review highlighted passages.
What does the percentage mean?
The score is the proportion of words in your text covered by matching phrases in the reference. It ignores case and punctuation. Repeated or overlapping matches never increase the score above 100%. It does not detect paraphrasing, translated copying or AI-generated writing.
Are my documents uploaded?
No. This checker processes your documents in your browser and does not save their text. Closing or refreshing this page clears the inputs. Imported text should be reviewed: PDF reading order and DOCX extraction can affect results.
Is this an internet-wide plagiarism check?
No. This free version compares only the two texts you supply. Citations, quotations and common phrases can legitimately match. Always review the context before drawing conclusions.
Need text from a scanned document? Use OCR PDF. You can also compare PDFs or convert PDF to Word.