Advanced Plagiarism Checker
Check repeated sentences, review text statistics and compare your writing against text you provide — with a simple, free online tool.
Check Your Text
Paste your writing below or upload a plain-text file.
Reference comparison only checks the two texts you provide. It does not search the internet.
Analysis Report
Results from your text analysis.
These are text-pattern estimates, not proof of plagiarism or an internet-wide plagiarism score.
Repeated Sentences
Reference Comparison
Free Online Plagiarism Checker
Use this online text checker to identify repeated sentences in your writing and compare your content with a reference passage. It can help students, bloggers, writers and editors review their work before publication.
How to Use the Plagiarism Checker
- Paste your text into the text box or upload a supported text file.
- Optionally paste a source passage into the reference text box.
- Click Check Text to generate your analysis.
- Review repeated sentences and reference similarity results.
- Copy, download or print the report for your records.
What Does This Tool Check?
The tool counts words, characters and sentences, identifies exact repeated sentences and can estimate word overlap between your text and a reference passage. It works in your browser and does not require an account.
Important Limitations
This browser-based checker does not search Google, academic journals, websites or private databases. A low similarity score does not mean that your work is plagiarism-free. A high score may reflect common phrases or repeated wording rather than copied work. Always verify sources and cite borrowed ideas properly.
Frequently Asked Questions
Is this plagiarism checker free?
Yes. The browser-based text analysis features in this widget are free to use and do not require an API key.
Can it detect plagiarism across the internet?
No. This version checks repetition inside your text and compares it with a reference passage you supply. Internet-wide detection requires a search service or a plagiarism database integration.
What does the similarity percentage mean?
It is an approximate text-overlap indicator for the selected comparison, not a definitive plagiarism verdict. It should not be treated as an official academic score.
Does the tool upload my writing?
No. The text analysis runs locally in your browser. The text you enter is not sent to a plagiarism service by this widget.
Can I check an essay or blog post?
Yes. Paste text from an essay, blog post, article or other writing. For this version, upload only plain-text files such as TXT, MD or CSV.