1
Input Texts
Paste your 'Original' text on the left and the 'Comparative' text on the right.
Duplicate Content Checker
Compare two texts to find similarities, detect plagiarism, or identify repeated content. Analyze uniqueness and extract matching phrases.
0 words
0 words
Match Sensitivity
Ignore Case
Treat A and a as same
Ignore Punctuation
Clean symbols before check
How to Check for Duplicate Content
2
Set Sensitivity
Choose to check by Word, Phrase (3-word sequences), or full Sentences for accurate results.
3
Review Matches
View the similarity percentage and see the exact phrases that appear in both texts.
Why Use This Tool?
Plagiarism Detection
Compare student essays or guest posts against source material to find copied sections.
Content Auditing
Ensure your updated website content is sufficiently different from the old version.
SEO Optimization
Avoid duplicate content penalties by checking if your product descriptions are too similar.
Version Control
Quickly see what changed between two drafts of a document without complex software.
Frequently Asked Questions
How does this Duplicate Content Checker work?
This tool takes two text inputs and compares them token by token. It breaks the text down based on your selected sensitivity (words, phrases, or sentences), calculates the mathematical intersection of the content, and generates a similarity percentage along with a list of matching segments.
Is this a plagiarism checker?
While it can detect plagiarism if you paste your content alongside a source text, this is primarily a "Text Comparison" tool. It does not search the internet; it only compares the two specific texts you provide. It is perfect for comparing two student essays, two versions of a document, or checking against a specific reference text.
What is the difference between Word, Phrase, and Sentence mode?
Word mode checks for exact word matches. Phrase mode (N-grams) checks for sequences of words, which is more accurate for detecting copied structure. Sentence mode looks for exact sentence matches, useful for detecting wholesale copying of paragraphs.
Is my data private?
Yes. All processing happens in your browser. Your text is never sent to a server, ensuring your intellectual property remains completely private.
Perfect For
Writers, editors, and SEO professionals
Teachers
Check student work
Editors
Compare versions
SEO Experts
Prevent penalties
Bloggers
Ensure uniqueness