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Plagiarism Checker & Guide

Find repeated phrases within your text, and learn how to avoid plagiarism with proper citation and paraphrasing.

Repeated Phrase Finder

Paste your text below to highlight phrases (3+ words) that appear more than once. This helps you identify unintentional repetition.

What Is Plagiarism?

Plagiarism is using someone else's words, ideas, or creative work and presenting it as your own without proper credit. It applies to text, images, music, code, and data.

Direct Plagiarism
Copying text word-for-word from a source without quotes or citation. This is the most obvious form.
Mosaic Plagiarism
Mixing copied phrases with your own words without attribution. Also called "patchwork plagiarism."
Paraphrasing Without Citation
Rewording someone else's ideas without credit. Even if you change the words, you must cite the source.
Self-Plagiarism
Reusing your own previously submitted work without disclosure. Common in academic settings.

Citation Format Quick Reference

APA (7th Edition)

Used in psychology, education, social sciences.

Book: Author, A. A. (Year). Title of book. Publisher. Journal: Author, A. A. (Year). Title of article. Journal Name, Volume(Issue), pages. DOI Website: Author, A. A. (Year, Month Day). Title. Site Name. URL

APA In-Text Citation

(Author, Year) or (Author, Year, p. X) for direct quotes. Example: (Smith, 2021, p. 45)

MLA (9th Edition)

Used in humanities, literature, language studies.

Book: Author Last, First. Title. Publisher, Year. Journal: Author. "Article Title." Journal, vol. X, no. X, Year, pp. X-X. Website: Author. "Page Title." Site Name, Day Month Year, URL.

MLA In-Text Citation

(Author Page) with no comma. Example: (Smith 45). If no author, use abbreviated title: ("Article" 45)

Chicago (17th Edition)

Used in history, arts, some social sciences.

Book: Author Last, First. Title. City: Publisher, Year. Journal: Author. "Title." Journal Vol, no. X (Year): Pages. Website: Author. "Page Title." Site. Month Day, Year. URL.

Chicago Notes Style

Uses numbered footnotes or endnotes. First reference is full citation; subsequent uses: Author, Shortened Title, page.

Paraphrasing Tips

  1. Read the original thoroughly first, then put it aside before writing.
  2. Change the structure of sentences, not just individual words.
  3. Use synonyms carefully - make sure they carry the same meaning in context.
  4. Maintain the meaning - do not distort the author's original intent.
  5. Always cite - paraphrasing still requires attribution to the original source.
  6. Check your version against the original to ensure it is sufficiently different.

Rule of Thumb

If you would not have written it that way without reading the source, cite it. When in doubt, cite it.