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Paste your text and get your plagiarism score in seconds.
Made for students, researchers and writers who check before they submit
Not just a score: see what was flagged, where it came from, and fix it in the same place.
The results were consistent across all three trials. Photosynthesis converts light energy into chemical energy stored in sugars. We then compared the growth rates.
Matched sentence · source page linked in the full report
Every matched sentence is listed with the page it was found on, so you see what overlaps and where it came from, not just a number.
Flagged
Photosynthesis converts light energy into chemical energy stored in sugars.
Rewritten
Through photosynthesis, plants capture light and lock its energy away as sugar.
Flagged passages can be rewritten right here in one click, your meaning kept and the rest of your text untouched.
We search web pages indexed by Google, sentence by sentence. Private databases such as Turnitin's are out of reach for any outside tool, and we say so instead of pretending.
Check an essay, an assignment, a paper or any piece of writing in three steps.
Paste your text into the editor or upload a .txt, .md or .docx file. Up to 1,000 words on the free check, 5,000 on Pro.
We look up passages from your text across web pages indexed by Google and compare each hit back to your wording. Your score appears in seconds.
The full report lists every matched sentence with its source. Rewrite flagged passages in one click, or add the citation you missed.
Want longer texts, every source and one-click rewriting? See what's in Pro
Most checkers hand you a number and leave the rest to you. We give you the score, the sources behind it and a way to fix what needs fixing, all in one place.
| Feature | ProofMyText | A typical free checker |
|---|---|---|
| Plagiarism score with source count | Yes | Yes |
| Matched sentences linked to their sources | Yes, in Pro | Varies |
| One-click rewrite of flagged passages | Yes | Rarely |
| AI-writing check on the same text | Yes | Rarely |
| Plain statement of what is and isn't searched | Yes | Varies |
| Free check without an account | Yes | Varies |
Everything you need to check, fix and finish your writing, in one subscription.
If your work has to be original before it is submitted or published, this check is for you.
Check for plagiarismCatch accidental overlap and missing citations before your instructor does. See which sentences match the web and fix them before you hand the work in.
Check drafts, abstracts and grant text against what is openly online, and make sure every borrowed idea is credited before submission or review.
Review student writing with a source-linked view of what matched, so the conversation is about specific sentences and citations, not just a percentage.
Confirm articles and copy are your own before they go live. A quick check protects your clients, your brand and your search rankings.
Plagiarism is presenting someone else's words, ideas or work as your own without giving credit. It is not only copy-and-paste: borrowing the shape of an argument, paraphrasing too closely, or reusing your own earlier work without saying so can all count.
Most plagiarism in student writing is unintentional, which is exactly why a short check before you submit is worth the minute it takes.
Knowing the forms makes them much easier to avoid.
Copying text word for word without quotation marks or a citation.
Rewording an idea while staying too close to the original and leaving out the citation.
Stitching phrases from several sources together as if they were your own.
Reusing your own previously submitted work without acknowledging it.
A missing citation, misplaced quotation marks, or a source you lost track of.
Submitting AI-generated text as your own where disclosure is required.
The consequences are real. For students, even unintentional plagiarism can mean a failed assignment, probation or worse. For writers and professionals it can damage credibility, search rankings and client trust, or turn into a copyright problem. Beyond the penalties, original work is how you show your own thinking.
A few habits prevent most problems:
We take passages from your text and search for them across web pages indexed by Google, then compare every hit back to your wording sentence by sentence. Matches are counted into a score, and the full report shows each matched sentence with the page it was found on.
When something is flagged, you can rewrite it in one click. The rewrite changes only the flagged sentences and keeps the rest of your text exactly as you wrote it.
Accuracy depends on what a tool can search and how it matches wording. We search the open web as Google indexes it, so exact and near-exact copies of published pages are found reliably, while heavily reworded passages and sources behind paywalls can be missed.
One note for students: like every outside tool, we cannot see your university's private archive of past submissions, so your institution's report may differ. Checking first still lets you find and fix overlap before that point.
A plagiarism checker looks for text that already exists somewhere else and tells you where. An AI detector looks at how the text is written and estimates whether a model produced it. A passage can be original and still read as AI-written, or copied and read as human, which is why we offer both checks on the same text.
Our other checks, and the details behind them.
Using someone else's words or ideas without giving them credit. It does not have to be on purpose: a missing citation counts at most institutions just as much as deliberate copying.
It takes passages from your text, searches for them in a large index of existing text, and reports what matched and where. Ours searches web pages indexed by Google and compares each hit to your wording sentence by sentence.
It can be. Rewording a source while keeping its structure and ideas, without a citation, is still presenting someone else's work as yours. Genuine paraphrasing changes the wording and structure and credits the source.
It depends on the rules you are writing under. Many schools and publishers treat undisclosed AI text as a breach of their policy even when nothing was copied from a specific source. Check the policy, and disclose when it is required.
The one whose index matches where your text could have come from. For anything that lives on the open web, a web-based check like ours finds it; for a university's private archive of past submissions, only the institution's own tool can see it.
There is no universal number. Quotes and common phrases push the percentage up legitimately, and some institutions set their own thresholds. Look at which sentences matched rather than the total alone.
Yes. Reusing your own earlier work without saying so is called self-plagiarism, and many courses and journals treat it as a breach. Cite or disclose your previous work.
Overlap you did not intend: a forgotten citation, quotation marks left out, or notes copied from a source and later mistaken for your own words. A check before submitting is the easiest way to catch it.
Most institutions use a tool built into their submission system, often with a private archive of past student papers. No outside checker can search that archive, so use ours to find and fix overlap with the open web before you submit.
Keep track of sources as you research, quote with quotation marks, paraphrase in your own words with a citation, and run a check before you submit so you can fix anything that is flagged.
For exact and near-exact copies of text that exists online, yes. Heavily reworded passages, paywalled sources and unpublished work can be missed by any tool, so treat the score as a guide and read the matched sentences.
Either cite the source properly or rewrite the passage in your own words. The one-click rewrite here changes only the flagged sentences, keeps your meaning and leaves the rest of the text untouched.
Paste your text above, or upload a file, and run the free check: up to 1,000 words and 3 checks a day with no account. Pro raises the limit to 5,000 words with unlimited checks and the full source report.
This checker exists to support original work, not to help anyone pass off work that is not theirs. Before you use it on coursework, read your institution's policy on plagiarism checkers and AI tools: rules differ by school and assignment.
The check is a verification step before you submit, and the rewrite is for fixing your own overlap, not for disguising someone else's text.
A clean plagiarism score is not the same as AI disclosure. We offer a separate AI-writing check because the two questions are different and both matter.
We say plainly what is searched and what is not, so you can decide how much to rely on the result instead of guessing.
Get your score, see your sources and fix flagged passages in one place.