Free · AI-Powered · Instant

Check Your Content
for Plagiarism

Paste your text to detect duplicate content patterns, get an originality score, and receive AI-powered rewrite suggestions.

0 words · 0 sentences
🤖 Add your Anthropic API key for deep AI analysis and rewrite suggestions. Set Key · Basic analysis works without a key.

Analyzing text…

0% ORIGINAL
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Unique Phrases
📝 Text Analysis
High similarity pattern
Common phrase pattern
Unique content
💡 Improvement Suggestions

Advanced Plagiarism Detection

Multi-layer analysis to ensure your content is truly original

🔍

Sentence Analysis

Every sentence is analyzed for common patterns, formulaic structures, and high-frequency phrase combinations.

📊

Originality Score

Get a 0–100% originality score based on phrase uniqueness, vocabulary diversity, and structural variety.

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AI Analysis

Claude AI provides deep content quality feedback, plagiarism risk assessment, and targeted rewrite suggestions.

✏️

Rewrite Tips

Get specific suggestions to rephrase flagged sentences and improve overall content authenticity.

How It Works

Three Steps to Originality

1

Paste Your Text

Copy and paste your article, essay, or any content. Minimum 50 words for best results.

2

Instant Analysis

Our system analyzes every sentence for duplicate patterns, common phrases, and structural similarities.

3

Review & Improve

See highlighted sections, your originality score, and AI suggestions to make your content unique.

Frequently Asked Questions

How accurate is this plagiarism checker?
Our tool uses multi-layer text fingerprinting and AI analysis to detect common phrase patterns and structural similarities. For the most comprehensive plagiarism detection across billions of web pages, combine our tool with academic databases. This tool is excellent for self-checking and improving originality before submission.
Is my text kept private?
Yes. Your text is processed entirely in your browser for the basic analysis. If you use the AI analysis feature (with your API key), only the text is sent to Anthropic's API for processing — it is not stored or used for training.
What is a good originality score?
A score of 85–100% indicates highly original content. 70–84% is good but may have some common phrases worth reviewing. Below 70% suggests significant common phrasing that should be rewritten for better originality.
Can I check AI-generated content?
Yes! AI-generated text often contains formulaic patterns and statistically common phrases that our tool can flag. The AI analysis mode specifically looks for signs of templated or formulaic writing that may indicate AI generation.

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