Free Plagiarism Checker
Paste any text and we will tell you which sentences already exist somewhere on the internet.
Scan Settings
General Rules
AI & Integrity
Exclude URLs
Three Steps, One Report
No setup needed. Drop your text in, hit the button, and read the results. The whole process takes under a minute.
Paste your text
Drop your essay, article, or any block of text into the editor. You can also upload a PDF, DOCX, or TXT file.
Run the scan
Hit "Check Plagiarism" and sit back. We query each sentence against the web, Google Scholar, PubMed, and more.
View detailed results
Every sentence is color-coded: red for plagiarized, yellow for similar, green for original. Click any flagged sentence to see the matching source.
What You Get
Not just a percentage. You get a full breakdown of every sentence, where it matched, and what to do about it.
Live Web Scanning
We do not rely on a static database. Your sentences are searched against live web results, academic journals, and open-access repositories as you scan.
Sentence-by-Sentence Breakdown
Most checkers give you one number. Ours highlights the exact sentences that triggered a match, so you know precisely what needs attention.
Clickable Source URLs
When we flag a sentence, we show you the URL it matched against. You can open it, verify the match yourself, and decide whether to cite or rewrite.
Nothing Gets Stored
We do not save your text, sell your data, or keep logs of what you submit. Once the scan finishes, your content is gone from our servers.
No Paywall to Start
You do not need to create an account or enter payment info to run a scan. Just paste and go. Free tier covers most use cases.
Wide Source Coverage
Results pull from Google Scholar, PubMed, JSTOR, news sites, blogs, LinkedIn, Medium, and the broader web. If it is published online, there is a good chance we will find it.
Plagiarism Comes in Different Forms
Most people think of copy-paste when they hear "plagiarism," but it is actually more nuanced than that. Here are the main types our tool looks for.
Direct Plagiarism
Straight copy-paste with no quotation marks or attribution. This is the type most people picture, and the easiest one for any checker to catch.
Mosaic Plagiarism
Grabbing a sentence here and a phrase there from different articles and weaving them into one paragraph. It looks original at first glance, but the ideas are borrowed.
Self-Plagiarism
Recycling your own previous submissions without telling anyone. Yes, reusing your own old essay in a new class counts. Most professors take this seriously.
Accidental Plagiarism
You read something, internalized it, and wrote something that ended up too close to the original. No bad intent, but the match is still there. Happens more often than people think.
How to Keep Your Work Original
Avoiding plagiarism is mostly about building good habits. These six will cover you in almost every situation.
Cite your sources
If you are building on someone else's idea, say so. A quick in-text citation is all it takes to stay on the right side of things.
Write in your own voice
After reading a source, close it. Then write what you remember in your own words. If it still sounds like the original, rewrite again.
Use quotation marks
If you want to use someone's exact phrasing, put it in quotes and cite the source. This is the simplest rule and the one people forget most.
Check before submitting
A quick scan before you hand something in can save a lot of headaches. Most unintentional matches are easy to fix once you know they are there.
Track your references
Start a reference list from day one of your research. Trying to remember where you read something three weeks later is a recipe for missing citations.
Rewrite flagged content
If plagiarism is detected, use our AI humanizer to rephrase it while keeping the original meaning.
Why Plagiarism Matters More Than You Think
Plagiarism is not just an academic buzzword. At its core, it means passing off someone else's work as your own. Sometimes it is deliberate, sometimes it is an accident, but either way the consequences tend to be the same: failed papers, damaged reputations, and in extreme cases, legal trouble over copyright.
The way our checker works is pretty straightforward. We take your text, split it into individual sentences, and run each one through a series of search queries. Those queries hit the open web, academic databases like Google Scholar and PubMed, open-access archives, and news indexes. For every sentence, we look at how closely it matches what is already published and give it a similarity score.
What makes this different from a simple Google search is that we also look for close rewording, not just word-for-word copies. If someone took a sentence, swapped three words, and rearranged the clauses, that still shows up. We also catch patchwork cases where bits from multiple sources get stitched into one paragraph.
Found a flagged sentence? Here is what to do. Open the matched source link and read the original. If you meant to reference it, just add a proper citation. If the phrasing landed too close by accident, rewrite it in your own words. And if you are curious whether your text reads like it was written by ChatGPT or a similar tool, try our AI content detector for a separate analysis.
Plagiarism Checker FAQs
Common questions about our free plagiarism checker tool.