What this plagiarism checker actually does
This is a free, in-browser self-check for repeated phrasing inside your own document. It tokenizes your essay, generates 6-word n-grams, and reports any phrase or sentence that appears more than once. It also flags structural duplication, copied sentences and over-reused signposts.
It does not compare your work against the web, journal databases, or other student submissions. For that level of check, your university's Turnitin or SafeAssign account is the right tool. This checker is the fast first pass that catches the obvious self-plagiarism and lazy paraphrasing before you submit.
How to interpret your similarity score
Under 5% is normal, most essays will have some incidental phrase repetition (transition words, common academic constructions). Between 5% and 15% suggests you're recycling phrasing too aggressively; identify the repeated 6-word phrases and rewrite them. Over 15% means significant chunks of your text are duplicated and should be reworded before submission.
If you're worried about external plagiarism (catching content lifted from a web source), upload to Turnitin via your institution or use a paid service like Copyscape. For a fully human-reviewed check on your work, our editors offer a Turnitin pre-screen as part of every order.