Is this plagiarism checker free?

Yes. You can paste a passage and run an online plagiarism check without an account, a card, or a word cap on the input box. The tool searches the public web for near-exact matches of your most distinctive sentences and shows you the source links, so you can judge each match yourself.

Does it give a plagiarism percentage?

No, and that is deliberate. A single originality percentage is easy to misread and easy to fake. Instead the checker shows you the actual passages that appear elsewhere on the web, a link to each source, and whether you already cited that source. Evidence you can read beats a number you have to trust.

Is this as accurate as Turnitin?

No. Turnitin and similar academic tools compare your work against paid databases of student papers, journals, and books that the public web search behind this tool cannot see. Treat this as a free self-check before you submit, not as proof of originality and not as a substitute for whatever originality system your institution uses.

Will my text be stored or shared?

The text stays in your browser until you press Check overlap. At that point the most distinctive sentences are sent to the search backend to look for matches. We do not save your document to build a corpus, and the tool never adds your writing to a database that another person's check could match against.

What counts as a match I should worry about?

A flagged passage is one that appears near-verbatim on a public page and that you have not quoted or cited. That is the pattern most likely to read as plagiarism to a marker. A matched passage that you did cite is shown too, but marked as cited, because quoting a source and attributing it is normal scholarship, not plagiarism.

Can it check a paraphrase?

Partly. The cross-check finds wording that is still close to the original, so a light paraphrase that keeps most of the source phrasing will often still match. A genuine rewrite in your own structure and words usually will not, which is the point: the goal is original phrasing with the idea credited, not surface word-swapping. To rewrite a passage properly, use the paraphraser, then run the check again.

What should I do with a flagged passage?

Read the source it matched, then choose one of three honest fixes. Quote it directly and add a citation if the exact wording matters. Rewrite it fully in your own words and still cite the idea if the idea is not yours. Or cut it if it was filler. Re-run the check afterwards to confirm the overlap is gone or is now properly attributed.

FREE · WEB CROSS-CHECK · NO SIGNUP

Plagiarism checker

A free online plagiarism check that cross-references your most distinctive sentences against the public web and your own citations. You get the matched passages, a link to each source, and whether you cited it, instead of a single originality percentage that hides which sentences actually overlap. It is a self-check for the public web, not a Turnitin-grade or academic-database scan.

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What this plagiarism checker does

This is a free online plagiarism check that cross-references your writing against the public web. It pulls the most distinctive sentences out of your text, searches for near-exact copies of them on pages a search engine can reach, and reports back the passages that match, a link to each source, and whether you already cited that source. You get evidence you can read rather than a single originality score, because a percentage hides the one thing that actually matters: which sentences overlap, and with what.

It is honest about its limits. The cross-check sees the public web only. It cannot read paywalled journals, library databases, printed books, or the private archives of student papers that academic systems like Turnitin compare against. So a clean result here means no public-web match was found in the sentences checked, not that your work is guaranteed original. Use it as a self-check you run before you submit, alongside good citation habits, not as a verdict.

How it works

When you press Check overlap, the tool does not search every sentence you wrote. Common sentences match everything and tell you nothing, so it ranks your text by how distinctive each sentence is and checks the ones most likely to be lifted from somewhere. For each of those, it looks for a near-verbatim copy on the public web. A hit becomes a piece of evidence: the matched sentence, the page it was found on, and a cited or not-cited tag based on whether your text already references that source.

The headline numbers follow the same evidence-first logic. You see how many overlapping passages were found that you did not cite, and the share of overlapping passages that you did cite. Neither is a plagiarism percentage. The first is a count of the passages a marker would most likely flag. The second tells you how well your citations cover the wording you borrowed. A high citation-coverage figure with a low uncited count is the healthy pattern.

When to use an originality checker

Run it before you hand in an essay, a dissertation chapter, a research summary, or a report that quotes other people heavily. It is most useful in the gap between drafting and submitting, when you have pulled in facts and phrasing from your reading and want to be sure every borrowed sentence is either quoted and cited or rewritten in your own words. It also helps when you have used an AI assistant to draft, because models reproduce common web phrasing, and an unattributed match to a public page reads exactly like copied text whether a person or a model wrote it.

It is the wrong tool for proving originality to an examiner, for checking against journals behind a paywall, or for clearing work for publication where a copyright claim is at stake. For those, you need the database-backed system your institution or publisher mandates. This checker is the cheap, fast pass you run first so that by the time the official check runs, there is nothing left to catch.

Step by step

Paste your passage into the editor. A few paragraphs work better than a single sentence, because the tool needs distinctive wording to search for.
Press Check overlap. The most distinctive sentences are sent to the web cross-check.
Read each flagged passage next to its source link. Decide whether the match is a quote you forgot to cite, a paraphrase that stayed too close, or a coincidence of common phrasing.
Fix the real overlaps. Quote and cite, rewrite fully, or cut. The not-cited tag points you to the passages that need attention first.
Run the check again to confirm the uncited overlaps are gone.

A worked before and after

Here is the kind of fix the checker is built to surface. The before version lifts a sentence almost word for word from a public encyclopedia entry with no citation. The after version keeps the same idea, rewrites it in the writer's own structure, and credits the source.

Before: flagged, not cited

“Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.”

The cross-check finds this near-verbatim on a public page and marks it not cited, because nothing in the text attributes it.

After: rewritten and cited

“In short, plants trap sunlight and store it as chemical energy in sugars, which respiration unlocks again whenever the plant needs fuel (Campbell & Reece, 2005).”

The wording and structure are the writer's own, and the idea is credited, so the passage no longer reads as copied.

How it differs from a two-text similarity check

This page searches the open web. If you instead want to compare two specific documents you already have, for example a draft against the source you read, or two versions of your own work, use the text similarity cross-check, which measures overlap between exactly two passages and runs entirely in your browser with no web search. Reach for that when you know both texts; reach for this checker when you want to find out whether your wording exists anywhere public that you have not credited.

The two pair naturally. Use this web plagiarism cross-check to discover an overlap, then paste the matched source and your passage into the similarity check to see the shared phrases highlighted side by side before you decide how to rewrite.

Tips for an honest check

Check the near-final draft, not an early outline. Distinctive, finished sentences give the cross-check something real to match.
Treat a cited match as fine. Quoting a source and attributing it is scholarship. The tool flags the uncited overlaps for a reason.
Do not chase a clean result by swapping single words. Surface-level word changes still match and still read as borrowed. Rewrite the idea in your own structure instead, then run a repeat check to confirm.
Keep the sources you read in a citation list as you go. The citation generator turns a source into a formatted reference so attributing a borrowed passage is a thirty-second job.
Remember the scope. A clean public-web result is reassuring, not proof. Paywalled and printed sources are invisible to it.

Frequently asked questions

Is this plagiarism checker free?: Yes. You can paste a passage and run an online plagiarism check without an account, a card, or a word cap on the input box. The tool searches the public web for near-exact matches of your most distinctive sentences and shows you the source links, so you can judge each match yourself.
Does it give a plagiarism percentage?: No, and that is deliberate. A single originality percentage is easy to misread and easy to fake. Instead the checker shows you the actual passages that appear elsewhere on the web, a link to each source, and whether you already cited that source. Evidence you can read beats a number you have to trust.
Is this as accurate as Turnitin?: No. Turnitin and similar academic tools compare your work against paid databases of student papers, journals, and books that the public web search behind this tool cannot see. Treat this as a free self-check before you submit, not as proof of originality and not as a substitute for whatever originality system your institution uses.
Will my text be stored or shared?: The text stays in your browser until you press Check overlap. At that point the most distinctive sentences are sent to the search backend to look for matches. We do not save your document to build a corpus, and the tool never adds your writing to a database that another person's check could match against.
What counts as a match I should worry about?: A flagged passage is one that appears near-verbatim on a public page and that you have not quoted or cited. That is the pattern most likely to read as plagiarism to a marker. A matched passage that you did cite is shown too, but marked as cited, because quoting a source and attributing it is normal scholarship, not plagiarism.
Can it check a paraphrase?: Partly. The cross-check finds wording that is still close to the original, so a light paraphrase that keeps most of the source phrasing will often still match. A genuine rewrite in your own structure and words usually will not, which is the point: the goal is original phrasing with the idea credited, not surface word-swapping. To rewrite a passage properly, use the paraphraser, then run the check again.
What should I do with a flagged passage?: Read the source it matched, then choose one of three honest fixes. Quote it directly and add a citation if the exact wording matters. Rewrite it fully in your own words and still cite the idea if the idea is not yours. Or cut it if it was filler. Re-run the check afterwards to confirm the overlap is gone or is now properly attributed.