Plagiarism Checker

Free online plagiarism checker that calculates percentage of copied content in your text with detailed source matching.

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7,732+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Plagiarism Checker processes input data instantly inside your browser.

Sample Input Original Value: 80, New Value: 120 (Calculate percentage increase)

Computed Result Percentage Increase: +50.00%

Execution Mode Client-Side In-Browser JS

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About This Tool

This free plagiarism checker analyzes your text against a comprehensive database of sample content to detect copied material. Upload documents or paste text to get an accurate plagiarism percentage score. The tool highlights matched sections and identifies potential sources of duplication, helping ensure content originality for students, writers, and professionals.

Save your calculation history with a free account

How to Use

Paste your text into the input box or upload a document (TXT, DOC, DOCX, PDF)
Adjust sensitivity settings if needed
Click 'Check for Plagiarism' button
View the plagiarism percentage and detailed results
Review matched sources and highlighted text sections

Frequently Asked Questions

Find Quick Answers

How accurate is the plagiarism percentage?

The tool uses advanced text comparison algorithms against a curated database of sample content to provide accurate plagiarism percentage scores. Results are indicative and should be verified with additional sources.

What file formats are supported?

You can upload TXT, DOC, DOCX, and PDF files, or simply paste text directly into the input box.

Is my text stored or shared?

No, all text processing happens in real-time and your content is not stored permanently or shared with third parties.

What does the plagiarism percentage mean?

The percentage indicates how much of your text matches existing content in our database. Lower percentages indicate more original content.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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