Plagiarism Checker
Similarity score and PDF report. Free, no sign-up.
Questions
What does the online check compare my text with?
English Wikipedia and the titles and abstracts of millions of research papers (via OpenAlex). It searches your most distinctive phrases, downloads the best matches and compares them word-for-word with your text. For other websites, it gives one-click exact-phrase searches on Google and Bing.
How is the similarity percentage worked out?
A word counts as matched when it is part of an identical run of 5 or more words found in a source. The percentage is the share of your words that match. Capital letters and punctuation are ignored.
Can I download a plagiarism report?
Yes. After a check, click Download report to get a PDF with the similarity score, the matching sources and your text with every matched passage highlighted and numbered by source.
Is it the same as Turnitin?
No. Turnitin also checks other students' submitted work and paywalled journals, which only it has access to. Use this to catch copied passages from public sources before you submit.
Is my text uploaded?
Your full text and files stay on your device. The online check sends only about 15 short phrases to Wikipedia and OpenAlex to search for them. Document comparison runs entirely in your browser.