Free online tools to generate, calculate,
convert, format, encode, and play.
 

Plagiarism Self-Check

Paste your own writing to highlight repeated phrases, over-quoting, and common patchwriting patterns. This is a private, in-browser self-check to catch accidental self-plagiarism and lazy paraphrasing before you submit; it is not a database plagiarism detector.


Your Text

Overview

0
Words
0
Repeated Phrases
0%
Quoted Text
Self-Check

Highlighted Text

Your highlighted text will appear here.
Repeated phrase Frequently repeated Quoted passage

Repeated Phrases

  • No repeated phrases found yet.

How It Works

This tool checks your text against itself only. Nothing is uploaded or compared to any external database, so it cannot confirm that a passage is original; it simply surfaces patterns worth a second look. All processing happens in your browser.

Repeated Phrases

The text is broken into overlapping word groups (n-grams) of the length you choose. Any group that appears more than once is flagged. Repetition of a distinctive multi-word phrase often signals copy-paste padding, an unintentional duplicate, or reusing wording from an earlier draft; this is the classic marker of accidental self-plagiarism.

Patchwriting Patterns

Patchwriting is paraphrasing that stays too close to the source; the writer swaps a few words but keeps the original sentence skeleton. Long stretches of a repeated phrase, especially the same opener reused across paragraphs, are highlighted more strongly (shown in red) so you can rewrite them in your own structure.

Quote Density

Text inside straight or curly quotation marks is detected and its share of the total word count is reported. Heavy reliance on direct quotes, even when properly attributed, can read as over-quoting and weaken your own voice. A common guideline is to keep quoted material under roughly 10-15% of an essay.

Self-Check Rating

The overview gives a quick rating combining how many repeated phrases were found and how much of the text is quoted. A rating of "Clear" means little repetition and light quoting; "Review" and "Rework" suggest you revisit the highlighted passages before submitting. The rating is guidance, not a grade.

Privacy

Everything runs locally in JavaScript. Your draft never leaves your device, which makes this safe to use on unpublished or graded work.



Feedback

Help us improve this page by providing feedback, and include your name/email if you want us to reach back. Thank you in advance.


Share with