Online Text Duplicate Checker

Check any text for duplicate content instantly. Upload documents or paste text to find repeated phrases and sentences.

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About This Tool

The Text Duplicate Checker is a powerful online tool that helps you identify duplicate content within your text. Simply paste your text or upload a document, and the tool will analyze it for repeated phrases, sentences, or paragraphs. It calculates similarity percentages and highlights matching sections, making it perfect for writers, editors, students, and content creators who need to ensure originality and avoid repetition in their work. The tool supports multiple file formats and provides detailed results with visual highlighting.

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How to Use

Paste your text into the textarea or upload a document file (TXT, DOC, DOCX, PDF).
Click the 'Check for Duplicates' button to start the analysis.
View the results showing duplicate sections with similarity percentages.
Use the highlighted text to identify exactly where duplicates occur in your content.

Frequently Asked Questions

Find Quick Answers

What types of files can I upload?

You can upload TXT, DOC, DOCX, and PDF files. The tool extracts text from these formats for duplicate checking.

How does the duplicate detection work?

The tool uses a client-side algorithm that breaks text into sentences and phrases, then compares them to find matches. It calculates similarity based on word overlap and structure.

Is my text stored or shared?

No, all processing happens in your browser. Your text is never sent to any server or stored anywhere.

What's considered a duplicate?

The tool identifies sentences or phrases that are identical or very similar (70%+ match). You can adjust the sensitivity in the advanced options.

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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