For students

Plagiarism checker for students: check before you submit

Paste your essay and see every match sentence by sentence, plus which sentences read as AI-written. Your first check is free, with no account.

0 / 1,000 words·0 chars
Scan options
What you get
  • Billions of web pages, journals & sources
  • Sentence-by-sentence similarity report
  • Auto-detects your language
  • No signup needed for your first scan
  • Free check up to 1,000 words
  • AI detection included
  • Never used to train AI

Check your essay wherever you write it

Web app

Paste your essay or upload a Word, PDF or text file.

Check an essay

Google Docs add-on

Check the whole document and see matches highlighted in place.

Docs add-on

Chrome extension

Check any text box or selection on the web from Chrome’s side panel.

Chrome extension
Your report

An essay plagiarism checker that shows its work

Not just a percentage: every matched sentence, the source it came from, and how to fix it.

Similarity score

Know your score, then read the sentences

The score is where you start, not a verdict. Quoted and cited text can match too, so the report shows exactly which sentences matched and why.

  • Matches and sources counted for you
  • Each matched sentence highlighted in your text
  • Colour-coded by source
Plagiarism score of 23%: 3 matches from 2 sources
Sources

See the source, then cite it

Forgot where a sentence came from? Open the match to read the original, then add the citation instead of rewriting blind.

  • Copied words shown in red
  • Compare your text with the source side by side
  • Cite it in APA, MLA, Chicago or Harvard
Matched source text with the copied words in red, and Compare side by side and Cite buttons
AI detection

See which sentences read as AI-written

Many universities now check for AI writing too. See what a detector would flag, sentence by sentence, before your instructor does.

  • An AI score for the whole essay
  • A likelihood for every sentence
  • In the same report as your plagiarism check
Essay with AI-likely sentences highlighted one by one
Citations

Build your reference list as you go

Most student plagiarism comes from citations that were never added. The citation generator formats each reference for you.

  • Auto-fill from a URL, DOI or ISBN
  • 16 source types
  • APA, MLA, Chicago and Harvard
Citation generator: auto-fill from URL, DOI or ISBN, or pick one of 16 source types
How it works

Check your essay in three steps

  1. Paste your draft

    Paste text or upload a file. Your first check is free, up to 1,000 words, with no account.

  2. Read each flag

    Open every highlighted sentence and see the source it matched, side by side.

  3. Fix, cite, rescan

    Add the missing citation or rewrite the passage, then check again before you submit.

Guides for students

How to avoid plagiarism

Most students who get flagged didn’t set out to cheat. These habits make plagiarism unlikely in the first place.

  1. Take notes in two columns

    Exact quotes with their source on one side, your own thoughts on the other.

  2. Paraphrase with the source closed

    Write the idea from memory, then check it is accurate.

  3. Cite when in doubt

    An extra citation costs nothing. A missing one is an integrity issue.

  4. Build your source list as you go

    Add each source the moment you use it.

  5. Check a day before the deadline

    Fresh eyes catch language that doesn’t sound like you.

FAQ

Questions from students

Yes. Your first plagiarism check and first AI check are free without an account, up to 1,000 words each. A free account gives you 3,000 words every month. Student plans add longer documents and more words.

Check your essay before you submit

Your first plagiarism and AI check is free, up to 1,000 words.