Free Plagiarism Checker
Scan your text against online sources, academic papers, and publications instantly.
Scan Settings
General Rules
AI & Integrity
Exclude URLs
How Our Plagiarism Checker Works
Our plagiarism checker scans online resources and academic publications in real time to identify copied or closely paraphrased content.
Paste your text
Copy and paste the content you want to check into the input field.
Run the scan
Click the check button to start the scan. Each sentence is searched across online sources, academic databases, and publications.
View detailed results
Review the overall plagiarism score and sentence-level breakdown with direct source links for each match found.
Plagiarism Checker Features
Our free plagiarism checker provides detailed analysis to help you ensure your content is original and properly attributed.
Real-Time Source Search
Each sentence is compared against billions of indexed pages from academic journals, published research, open-access repositories, social media platforms, and online content in real time.
Sentence-Level Analysis
Get a detailed breakdown showing which specific sentences match published content, with similarity scores and color-coded results.
Source Links Included
Every matched sentence includes a direct link to the original source, so you can verify the match and properly cite the content.
Secure and Private
Your text is processed in real time and is never stored or shared. We respect your privacy and do not retain any submitted content.
Completely Free
Use the plagiarism checker for free with no account or credit card required. Simply paste your text and start checking instantly.
Comprehensive Database
We scan across Google Scholar, PubMed, JSTOR, open-access repositories, online publications, news archives, social media platforms like LinkedIn and Medium, and student-submitted academic works.
Common Types of Plagiarism
Plagiarism is not always intentional. Understanding the different types can help you avoid it in your academic and professional writing.
Direct Plagiarism
Copying text word-for-word from a source without quotation marks or citation. This is the most obvious form and the easiest to detect.
Mosaic Plagiarism
Mixing phrases from different sources and stitching them together without proper attribution. Also called patchwork plagiarism.
Self-Plagiarism
Reusing your own previously submitted work without disclosure. Even your own past writing needs to be cited when reused in a new context.
Accidental Plagiarism
Forgetting to cite a source, using incorrect citation format, or unintentionally paraphrasing too closely. Common among students.
How to Avoid Plagiarism
Follow these simple practices to keep your writing original and properly attributed.
Cite your sources
Always credit the original author when using their ideas, data, or direct wording in your work.
Write in your own voice
Read, understand, and then express ideas using your own language and sentence structure.
Use quotation marks
When using exact wording from a source, always wrap it in quotation marks and include a citation.
Check before submitting
Run your text through a plagiarism checker before final submission to catch any unintentional matches.
Track your references
Keep a running list of all sources during research so nothing is missed when writing your bibliography.
Rewrite flagged content
If plagiarism is detected, use our AI humanizer to rephrase it while keeping the original meaning.
What Is Plagiarism and Why Does It Matter?
Plagiarism is the act of presenting someone else's words, ideas, or research as your own without giving proper credit. It can be intentional or accidental, but in both cases, it carries serious consequences in academic and professional settings, including failing grades, loss of credibility, and even legal action in cases of copyright infringement.
Our plagiarism checker works by splitting your text into individual sentences and searching each one across a comprehensive database that includes online publications, academic journals, research papers, student-submitted works, and open-access repositories. It then compares your sentences against published content using advanced text similarity algorithms. The result is a detailed report showing which sentences are original, which are similar to existing content, and which appear to be directly copied from a source.
Unlike simple copy-paste detectors, our tool uses both exact matching and fuzzy similarity comparison. This means it can detect not only direct copies but also closely paraphrased content that retains the structure and key phrases of the original source. It can also identify mosaic plagiarism, where phrases from multiple sources are stitched together.
What should you do if plagiarism is detected? Start by reviewing the flagged sentences and their matched sources. For content you intended to reference, add proper citations. For content that is too similar to a source, rewrite it in your own words. For a deeper analysis, try our AI content detector to check whether content may have been generated by AI tools like ChatGPT.
Plagiarism Checker FAQs
Common questions about our free plagiarism checker tool.