Plagiarism Self-Check Prep Tool
Your draft
Quotation report
No quotation marks found in this draft.
Before you submit to a checker
Submit the draft as plain text or PDF; formatting is not what the checker compares.
Include the reference list in the same file so cited matches can be discounted.
List the sources you consulted but did not end up citing; some services score against everything submitted.
Keep quotations inside quotation marks: a check reports a match either way, but a marked and cited quote is explained in one line.
After the report, read every flagged passage against its source before changing anything — a high score is a question, not a verdict.
Checks
Paste the draft to check its quotations and prepare the submission.
Scope and limits
This page cannot detect plagiarism. Similarity detection means comparing your text against a corpus, which is a service, not a local script. What it checks is the preparation that decides what a similarity report will say: quotation marks that balance, citations close enough to follow, and quoted material kept in a proportionate share.
A high similarity score is a question, not a verdict. Read every flagged passage against its source before changing anything, and never use a checker as a substitute for citing.
The plagiarism self-check prep tool cannot detect plagiarism, and says so; it checks the quotation hygiene and the citation placement that decide what a similarity report will actually say.
What is Plagiarism Self-Check Prep Tool?
The plagiarism self-check prep tool begins with a limitation that most tools in this space hide: it cannot detect plagiarism. Similarity detection means comparing a document against a corpus, and a corpus is a service rather than a local script. What the page does instead is the preparation that decides what a similarity report will say. Unmarked quotations and over-quoted sections are the two causes of alarming similarity scores that are not plagiarism at all, and both are visible from the draft itself.
Every quotation in the draft is found, whether it uses straight or curly quotation marks, and listed with its length, the sentence it sits in, and whether a citation appears in that sentence or the next. Citation proximity is the check that matters most in practice: a checker discounts matches that point at a source, and a quotation whose source is three sentences away discounts nothing. The tool also counts the citations in the draft, so a long piece with none is flagged as plainly as a short one with a single unsupported quote.
Quoted material is measured as a share of the whole draft. Past roughly fifteen per cent, even fully cited work is doing the writing rather than supporting it, and the check says so with the number. Quotations longer than forty words are flagged for block treatment, because that is the conventional threshold and because a long inline quote is easy to lose a citation for. Unbalanced quotation marks are reported first of all, since a single unclosed mark can swallow an entire sentence into a match.
The prep checklist covers the submission itself. Send plain text so formatting is not compared; include the reference list in the same file so cited matches can be discounted; list the sources you consulted but did not cite, because some services score against everything you submit; keep quotations marked, since the report will show the match either way but a marked and cited quote is explained in one line; and read every flagged passage against its source before changing a word.
What the page cannot do is compare your text to anything outside itself, judge whether a passage is properly attributed in a disciplinary sense, or tell you whether a similarity score is acceptable for your course or venue. A high score is a question, not a verdict, and the checklist ends by saying so.
The most common false alarm is the long quotation that is properly cited. A similarity report highlights it like any other match, and a writer who has not prepared an explanation may cut a quotation that was doing real work. The prep report is that explanation: a list of every quotation, its length and the citation beside it, ready to be compared line by line with the service's output. Keep it with the draft. When a flagged passage is on the list, the answer is one sentence; when it is not, the report shows where to look, which is the difference between revising calmly and rewriting under pressure.
How to use Plagiarism Self-Check Prep Tool
- Paste the draft as plain text, quotations included.
- Read the quotation report: each quote's length and whether it is cited.
- Fix unbalanced marks, uncited quotes and block-length quotations.
- Check the quoted share and reduce it if the draft is mostly borrowed.
- Work the preparation checklist before submitting to a similarity service.
When to use Plagiarism Self-Check Prep Tool vs related tools
Use the plagiarism self-check prep tool before submitting a draft to a similarity service, especially when the draft leans on sources: an essay with long quotations, a report quoting policy documents, a thesis chapter built from prior work. Fixing the quotation hygiene first turns an alarming report into an explainable one. When a citation is missing rather than misplaced, the In-Text Citation Builder writes it, and the Reference List Generator assembles the list that lets a checker discount cited matches.
Privacy & Security
This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.